An adult is a human being Humans commonly refers to the species Homo sapiens , the only extant member of the Homo genus of bipedal primates in Hominidae, the great ape family. However, in some cases the term is used to refer to any member of the genus Homo or living Biology is a natural science concerned with the study of life and living organisms, including their structure, function, growth, origin, evolution, distribution, and taxonomy organism In biology, an organism is any contiguous living system . In at least some form, all organisms are capable of response to stimuli, reproduction, growth and development, and maintenance of homoeostasis as a stable whole. An organism may either be unicellular (single-celled) or be composed of, as in humans, many trillions of cells grouped into that is of relatively mature age, typically associated with sexual maturity and the attainment of reproductive age Reproduction is the biological process by which new "offspring" individual organisms are produced from their "parents". Reproduction is a fundamental feature of all known life; each individual organism exists as the result of reproduction. The known methods of reproduction are broadly grouped into two main types: sexual and. In human context, the term has other subordinate meanings associated to social and legal concepts, for example a legal adult is a legal concept for a person A person is any individual human being. The term people is the plural of "person" (along with the slightly rarer word "persons"); however, "people" may also be used as a singular to refer to an entire nation or ethnic group who has attained the age of majority The age of majority is the threshold of adulthood as it is conceptualized in law. It is the chronological moment when a minor ceases to legally be considered a child and assumes control over their persons, actions, and decisions, thereby terminating the legal control and legal responsibilities of their parents or guardian over and for them. The and is therefore regarded as an independent, self-sufficient Self-sufficiency refers to the state of not requiring any outside aid, support, or interaction, for survival; it is therefore a type of personal or collective autonomy. On a large scale, a totally self-sufficient economy that does not trade with the outside world is called an autarky, and responsible (contrast with "minor The term minor is used to refer to a person who is under the age in which one legally assumes adulthood and is legally granted rights afforded to adults in society. Depending on the jurisdiction and application, this age may vary, but is usually marked at either 12, 16, 18, 20, or 21. Specifically, the status of minor is defined by the age of"). Adulthood can be defined in terms of physiology Physiology is the science of the functioning of living systems. It is a subcategory of biology. In physiology, the scientific method is applied to determine how organisms, organ systems, organs, cells and biomolecules carry out the chemical or physical function that they have in a living system. The word physiology is from Ancient Greek: φύσις, psychological adult development For example, Positive Adult Developmental may be divided into at least six parts: hierarchical complexity, , knowledge, experience, expertise, wisdom, and spirituality, law Law is a system of rules, usually enforced through a set of institutions. Laws can shape or reflect politics, economics and society in numerous ways and serves as a primary social mediator of relations between people. Contract law regulates everything from buying a bus ticket to trading on derivatives markets. Property law defines rights and, personal character, or social status.

Biological adulthood

Historically and cross-culturally, adulthood has been determined primarily by the start of puberty (the appearance of secondary sex characteristics such as menstruation in women, ejaculation in men, and pubic hair in both sexes). In the past a person usually moved from the status of child directly to the status of adult, often with this shift being marked by some type of coming-of-age test or ceremony.

Most medical and general English dictionaries define childhood Childhood is the age span ranging from birth to adolescence. In developmental psychology, childhood is divided up into the developmental stages of toddlerhood , early childhood (play age), middle childhood (school age), and adolescence (post-puberty) as the period from infancy to puberty, thus historically adulthood began with puberty. After the social construct of adolescence Adolescence is a transitional stage of physical and mental human development generally occurring between puberty and legal adulthood (age of majority), but may also be defined as ending with the teenage stage. According to Erik Erikson's stages of human development, for example, a young adult is generally a person between the ages of 20 and 40, was created, adulthood split into two forms: social adulthood and biological adulthood. Thus, there are now two primary forms of adults: biological adults (people who have attained reproductive ability, are fertile, or who evidence secondary sex characteristics) and social adults (people who are recognized by their culture and/or law as being adults). Depending on the context, adult can indicate either definition.

Although few or no established dictionaries provide a definition for the two word term biological adult, the first definition of adult in multiple dictionaries ^[1][2] includes "the stage of the life cycle of an animal after reproductive capacity has been attained". Thus, the base definition of the word adult is the period beginning at puberty. Although this is the primary definition of the base word adult, the two word term biological adult stresses or clarifies that the original definition, based on the beginning of puberty, is being used (that is, the organism has matured to the biologically important point of being able to reproduce).

Although there is no scientific agreement on when physical maturation completes, in modern society social adulthood somewhat corresponds to the completion of physical maturation. Because the term adult is most often used without the adjective social or biological, and since the term is frequently used to refer to social adults, some writers have taken the meaning of the two word phrase biological adult to begin at the end of physical maturation rather than the onset of puberty.

In modern developed countries, puberty and therefore biological adulthood generally begins around 10 years of age for girls and 12 years of age for boys,^[3] though this will vary from person to person.

Legal adulthood

Legally it means that one can engage in a contract In law, a contract is an agreement between two or more parties which, if it contains the elements of a valid legal agreement, is enforceable by law or by binding arbitration. That is to say, a contract is an exchange of promises with specific legal remedies for breach. These can include Compensatory remedy, whereby the defaulting party is required. The same or a different minimum age may be applicable to, for example, parents losing parenting Parenting is the process of promoting and supporting the physical, emotional, social, and intellectual development of a child from infancy to adulthood. Parenting refers to the activity of raising a child rather than the biological relationship rights and duties regarding the person concerned, parents losing financial responsibility, marriage Marriage is a social union or legal contract between individuals that creates kinship. It is an institution in which interpersonal relationships, usually intimate and sexual, are acknowledged in a variety of ways, depending on the culture or subculture in which it is found. Such a union may also be called matrimony, while the ceremony that marks, voting Voting is a method for a group such as a meeting or an electorate to make a decision or express an opinion—often following discussions, debates, or election campaigns. It is often found in democracies and republics, having a job Employment is a contract between two parties, one being the employer and the other being the employee. An employee may be defined as: "A person in the service of another under any contract of hire, express or implied, oral or written, where the employer has the power or right to control and direct the employee in the material details of how, serving in the military A military is an organization authorized to use force, usually including use of weapons, in defending its country by combating actual or perceived threats. As an adjective the term "military" is also used to refer to any property or aspect of a military. Militaries often function as societies within societies, by having their own, buying/possessing firearms A firearm is a device which projects either single or multiple projectiles at high velocity through a controlled explosion. The firing occurs by the gases produced through rapid, confined burning of a propellant. This process of rapid burning is technically known as deflagration. In older firearms, this propellant was typically black powder, but (if legal at all), driving Driving is the controlled operation of a land vehicle, such as a car, truck or bus, traveling abroad, involvement with alcoholic beverages An alcoholic beverage is a drink containing ethanol . Alcoholic beverages are divided into three general classes: beers, wines, and spirits (if legal at all), smoking Tobacco smoking is the practice where tobacco is burned and the vapors either tasted or inhaled. The practice began as early as 5000–3000 BC. Many civilizations burnt incense during religious rituals, which was later adopted for pleasure or as a social tool. Tobacco was introduced to the Old World in the late 1500s where it followed common trade, sex, gambling Gambling is the wagering of money or something of material value on an event with an uncertain outcome with the primary intent of winning additional money and/or material goods. Typically, the outcome of the wager is evident within a short period (both lottery A lottery is a form of gambling which involves the drawing of lots for a prize. The word stems from the Dutch word loterij, which is derived from the noun lot meaning fate or destiny and casino A casino is a facility that houses and accommodates certain types of gambling activities. Casinos are most commonly built near or combined with hotels, restaurants, retail shopping, cruise ships and other tourist attractions. Some casinos are known for hosting live entertainment events, such as stand-up comedy, concerts, and sporting events) being a prostitute or a client of a prostitute (if legal at all), being a model or actor in pornography, etc. Admission of a young person to a place may be restricted because of danger for that person, concern that the place may lead the person to immoral behavior, and/or because of the risk that the young person causes damage (for example, at an exhibition of fragile items).

One can distinguish the legality of acts of a young person, and of enabling a young person to carry out that act, by selling, renting out, showing, permitting entrance, participating, etc. There may be distinction between commercially and socially enabling. Sometimes there is the requirement of supervision by a legal guardian A legal guardian a person who has the legal authority to care for the personal and property interests of another person, called a ward. Usually, a person has the status of guardian because the ward is incapable of caring for his or her own interests due to infancy, incapacity, or disability. Most countries and states have laws that provide that, or just by an adult. Sometimes there is no requirement, but just a recommendation.

With regard to pornography one can distinguish:

• being allowed inside an adult establishment
• being allowed to purchase pornography
• being allowed to possess pornography
• another person being allowed to sell, rent out, or show the young person pornography, see disseminating pornography to a minor
• being a pornographic actor: rules for the young person, and for other people, regarding production, possession, etc. (see child pornography)

With regard to films with violence, etc.:

• another person being allowed to sell, rent out, or show the young person a film, a cinema being allowed to let a young person (under 18) enter

The legal definition of entering adulthood usually varies between ages 15–21, depending on the region in question. Some cultures in Africa Africa is the world's second-largest and second most-populous continent, after Asia. At about 30.2 million km² including adjacent islands, it covers 6% of the Earth's total surface area and 20.4% of the total land area. With a billion people (as of 2009, see table) in 61 territories, it accounts for about 14.72% of the world's human population define adult at age 13.

According to Jewish The Jews , also known as the Jewish people, are a nation and ethnoreligious group originating in the Israelites or Hebrews of the Ancient Near East. The Jewish ethnicity, nationality, and religion are strongly interrelated, as Judaism is the traditional faith of the Jewish nation. Converts to Judaism, whose status as Jews within the Jewish ethnos tradition, adulthood is reached at age 13 (the age of the Bar Mitzvah According to Jewish law, when Jewish children reach 13 years old for boys and 12 years old for girls they become responsible for their actions, and "become a Bar or Bat Mitzvah" (English: Son or Daughter (Bat) of the commandments). In many Conservative and Reform synagogues, girls celebrate becoming a Bat Mitzvah at age 12[citation), for Jewish boys, for example, were expected to demonstrate preparation for adulthood by learning the Torah The term Torah , also known as the Pentateuch (Greek: penta [five] and teuchos [tool, vessel, book]), refers to the Five Books of Moses—the entirety of Judaism's founding legal and ethical religious texts. A "Sefer Torah" (סֵפֶר תּוֹרָה, "book of Torah") or Torah scroll is a copy of the Torah written on parchment and other Jewish practices. The Christian A Christian (pronounced /ˈkrɪstʃən/ ) is a person who adheres to Christianity, an Abrahamic, monotheistic religion based on the life and teachings of Jesus of Nazareth, who Christians believe is the Messiah (the Christ in Greek-derived terminology) prophesied in the Hebrew Bible, and the son of God. Most Christians believe in the doctrine of Bible The Bible refers to collections of sacred scripture of Judaism and Christianity. There is no single version: both the individual books and their order vary. The Hebrew Bible contains 39 books, while Christian Bibles range from the 66 books of the Protestant canon to 81 books in the Ethiopian Orthodox Bible. The oldest surviving Christian Bibles and Jewish scripture The Tanakh is a name used in Judaism for the Hebrew Bible. The Tanakh is also known as the Masoretic Text or the Miqra. The name "Tanakh" is a Hebrew acronym formed from the initial Hebrew letters of the Masoretic Text's three traditional subdivisions: The Torah ("Teaching", also known as the Five Books of Moses), Nevi'im (& has no age requirement for adulthood or marrying Marriage is a social union or legal contract between individuals that creates kinship. It is an institution in which interpersonal relationships, usually intimate and sexual, are acknowledged in a variety of ways, depending on the culture or subculture in which it is found. Such a union may also be called matrimony, while the ceremony that marks, which includes engaging in sexual activity. The age of consent for sexual relations in the Vatican is 13,^{[citation needed]} the age when many girls achieve menses, and are thus reproductive and therefore physically capable of marriage and childbirth. However, the Vatican does not allow sex outside of marriage.^[4] The 1983 Code of Canon Law states, "A man before he has completed his sixteenth year of age, and likewise a woman before she has completed her fourteenth year of age, cannot enter a valid marriage"^[5]. According to The Disappearance of Childhood by Neil Postman Neil Postman was an American author, media theorist and cultural critic, who is best known by the general public for his 1985 book about television, Amusing Ourselves to Death. For more than forty years, he was associated with New York University. Postman was a humanist, who believed that "new technology can never substitute for human values.&, the Christian Church Christian Church and church (Greek kyriakon , "thing belonging to the Lord"; also ekklesia (ἐκκλησία) (Latinized as ecclesia, "assembly") are used to denote both a Christian association of people and a place of worship. In the phenomenological sense there are many such associations of people that call themselves of the Middle Ages The Middle Ages is a period of European history from the 5th century to the 15th century. The period followed the fall of the Western Roman Empire in 476, and preceded the Early Modern Era. It is the middle period in a three-period division of history: Classical, Medieval, and Modern. The term "Middle Ages" (medium aevum) was coined in considered the age of accountability, when a person could be tried and even executed Capital punishment, or the death penalty, is the execution of a person by judicial process as a punishment for an offense. Crimes that can result in a death penalty are known as capital crimes or capital offences. The term capital originates from Latin capitalis, literally "regarding the head" . Hence, a capital crime was originally one as an adult, to be age 7.

In most of the world, including most of the United States ^ b. English is the de facto language of American government and the sole language spoken at home by 80% of Americans age five and older. Spanish is the second most commonly spoken language, parts of the United Kingdom The United Kingdom of Great Britain and Northern Ireland[note 7] is a sovereign state located off the northwestern coast of continental Europe. It is an island country, spanning an archipelago including Great Britain, the northeastern part of the island of Ireland, and many small islands. Northern Ireland is the only part of the UK with a land (England The area now called England has been settled by people of various cultures for about 35,000 years, but it takes its name from the Angles, one of the Germanic tribes who settled during the 5th and 6th centuries. England became a unified state in AD 927, and since the Age of Discovery, which began during the 15th century, has had a significant, Northern Ireland Northern Ireland is one of the four countries of the United Kingdom. Situated in the north-east of the island of Ireland, it shares a border with the Republic of Ireland to the south and west. At the time of the 2001 UK Census, its population was 1,685,000, constituting about 30% of the island's total population and about 3% of the population of, Wales Wales ( /ˈweɪlz/ Welsh: Cymru; pronounced [ˈkəmrɨ] (help·info)) is a country that is part of the United Kingdom, bordered by England to its east, and the Atlantic Ocean and Irish Sea to its west. Wales has a population estimated at three million and is officially bilingual; Welsh and English have equal status, and bilingual signs are the), India India, officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with 1.18 billion people, and the most populous democracy in the world. Mainland India is bounded by the Indian Ocean on the south, the Arabian Sea on the west, and the Bay of Bengal on the and China China is seen variously as an ancient civilization extending over a large area in East Asia, a nation and/or a multinational entity, the legal Law is a system of rules, usually enforced through a set of institutions. Laws can shape or reflect politics, economics and society in numerous ways and serves as a primary social mediator of relations between people. Contract law regulates everything from buying a bus ticket to trading on derivatives markets. Property law defines rights and adult age is 18 (historically 21) for most purposes, with some notable exceptions:

1. the United Kingdom: Scotland Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the southwest. In addition to the mainland, Scotland (16)
2. South Korea South Korea, officially the Republic of Korea (Korean: 대한민국, pronounced [tɛːhanminɡuk̚] ( listen)), is a country in East Asia, located on the southern portion of the Korean Peninsula. It is neighbored by China to the west, Japan to the east, and North Korea to the north. Its capital is Seoul. South Korea lies in a temperate climate & British Columbia, New Brunswick, Newfoundland and Labrador, Northwest Territories, Nova Scotia, Nunavut, Yukon Territory in Canada and Nebraska and Alabama in the United States (19)
3. Indonesia and Japan (20)

See also

• Adolescence
• Adult development
• Adultism
• Age of consent
• Age of majority
• Child
• Legal drinking age
• Manhood
• Marriageable age
• Motion picture rating system
• Voting age
• Watershed (television)
• Womanhood

References

1. ^ International Dictionary of Medicine and Biology (1986)
2. ^ Churchill’s Medical Dictionary (1989)
3. ^ (Chumlea, 1982).
4. ^ CCC 2390
5. ^ 1083, §1

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