adult
Other forms: adults; adultly
Adult is noun and an adjective, both of which refer to something mature, no longer a child. A full-grown person is called an adult: they can vote, rent cars, and choose to eat sugary cereal for dinner every night.
If you're still a child, then you are not an adult — that's the noun version. Childish people don't behave in an adult manner — that's the adjective. A child might be scared by the Wicked Witch of the West, but an adult knows she's not real. Learning the difference between real life and make-believe is one of the upsides of becoming an adult.
Definitions of adult
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a fully developed person from maturity onwardsynonyms: grownupantonyms:juvenilea young person, not fully developedtypes:brachycephalican adult with a short broad headcaregivera person who is responsible for attending to the needs of a child or dependent adultcentrist, middle of the roader, moderate, moderationista person who takes a position in the political centerdolichocephalican adult with a long narrow headex-spousea person who was formerly a spousehosta person who invites guests to a social event (such as a party in his or her own home) and who is responsible for them while they are thereimportant person, influential person, personageone whose actions and opinions strongly influence the course of eventsJack of all tradesa person able to do a variety of different jobs acceptably wellliberal, liberalist, progressivea person who favors a political philosophy of progress and reform and the protection of civil libertiesliberala person who favors an economic theory of laissez-faire and self-regulating marketspatriciana person of refined upbringing and mannerspledgeesomeone to whom a pledge is made or someone with whom something is deposited as a pledgepledgersomeone who makes or gives a pledgesobersidesa serious and sedate individualthoroughbreda well-bred personBlack mana man who is BlackBlack womana woman who is Blackwhite mana man who is Whitewhite womana woman who is Whitemaenad(Greek mythology) a woman participant in the orgiastic rites of Dionysusarmchair liberala person of liberal ideals who takes no action to realize thembaggagea worthless or immoral womanbey(formerly) a title of respect for a man in Turkey or Egyptbig cheese, big deal, big enchilada, big fish, big gun, big shot, big wheel, head honchoan important influential personboya friendly informal reference to a grown manex-boyfrienda man who is no longer a woman's boyfriendbroadslang term for a womancapitalista conservative advocate of capitalismcareerista professional who is intent on furthering his or her career by any possible means and often at the expense of their own integritycata spiteful woman gossipcentenariansomeone who is at least 100 years oldCinderellaa woman whose merits were not previously recognized but who then achieves sudden success and recognitionconformistsomeone who conforms to established standards of conduct (especially in religious matters)craftsmana professional whose work is consistently of high qualitycritica person who is professionally engaged in the analysis and interpretation of works of artcurmudgeona crusty irascible cantankerous old person full of stubborn ideasbeau, clotheshorse, dandy, dude, fashion plate, fop, gallant, sheik, swella man who is much concerned with his dress and appearancedoddererone who dodders from old age and weaknessdominatrixa dominating woman (especially one who plays that role in a sadomasochistic sexual relationship)donnaan Italian woman of rankdotardan oldster in his dotage; someone whose age has impaired his intellectdove, peaceniksomeone who prefers negotiations to armed conflict in the conduct of foreign relationsdoyennea woman who is the senior member of a groupelder statesmanany influential person whose advice is highly respectedeminence grise(French) a person who exercises power or influence in certain areas without holding an official positionDelilah, enchantress, femme fatale, siren, temptressa woman who is considered to be dangerously seductiveEsq, Esquirea title of respect for a member of the English gentry ranking just below a knight; placed after the nameExcellencya title used to address dignitaries (such as ambassadors or governors); usually preceded by `Your' or `His' or `Her'eyefula strikingly beautiful womanfather-figurea man (often a powerful or influential man) who arouses emotions usually felt for your real father and with whom you identify psychologicallyfixer, influence peddlersomeone who helps a person in trouble with authorities, usually using underhand or illegal methods for a feefuddy-duddya conservative who is old-fashioned or dull in attitude or appearancegaloota disreputable or clumsy persongeisha, geisha girla Japanese woman trained to entertain men with conversation and singing and dancinggeezera man who is (usually) old and/or eccentricgentlemana man of refinementgirla friendly informal reference to a grown womangirlfriendany female friendgold diggera woman who associates with or marries a rich man in order to get valuables from him through gifts or a divorce settlementgravidaa pregnant womanhardlinera politician who is uncompromising on a position or policyPCP, caregiver, health care provider, health professional, primary care providera person who helps in identifying or preventing or treating illness or disabilityheavy hitteran influential person who works hard to promote the causes they are interested inhierarcha person who holds a high position in a hierarchyheroinea woman possessing heroic qualities or a woman who has performed heroic deedsHerra German man; used before the name as a title equivalent to Mr in EnglishHooray Henrya lively and ineffectual upper-class young manhostessa woman hosthousefathera man in charge of children in an institutionhunka well-built, attractive maninamorataa woman with whom you are in love or have an intimate relationshipinamoratoa man with whom you are in love or have an intimate relationshipironsidea man of great strength or braveryjezebela shameless impudent scheming womanjilta woman who jilts a loverkingmakeran important person who can bring leaders to power through the exercise of political influenceladya polite name for any womanlatitudinariana person who is broad-minded and tolerant (especially in standards of religious belief and conduct)attorney, lawyera professional person authorized to practice law; conducts lawsuits or gives legal advicebibliothec, librariana professional person trained in library science and engaged in library servicesmaenadan unnaturally frenzied or distraught womanmagnificoa person of distinguished rank or appearanceadonisany handsome young manmatriarcha feisty older woman with a big bosom (as drawn in cartoons)matrona woman in charge of nursing in a medical institution or schoolmestizaa woman of mixed racial ancestry (especially mixed European and Native American ancestry)middle-aged mana man who is roughly between 45 and 65 years oldminimalista conservative who advocates only minor reforms in government or politicsfancy woman, kept woman, mistressan adulterous woman; a woman who has an ongoing extramarital sexual relationship with a manMonsieurused as a French courtesy title; equivalent to English `Mr'mossbackan extremely old-fashioned conservativemother figurea woman who evokes the feelings usually reserved for a motherneoliberala liberal who subscribes to neoliberalismnepotista powerful person who shows favoritism to relatives or close friendsnonagenariansomeone whose age is in the ninetiesnullipara(obstetrics) a woman who has never give birth to a childnympheta sexually attractive young womanoctogenariansomeone whose age is in the eightiesold boya vivacious elderly manold womana woman who is oldpawnbrokera person who lends money at interest in exchange for personal property that is deposited as securityPeter Pana boyish or immature man; after the boy in Barrie's play who never grows uppluralistsomeone who believes that distinct ethnic or cultural or religious groups can exist together in societypolicy makersomeone who sets the plan pursued by a government or business etc.poncea man who is effeminate in his manner and fussy in the way he dressespossemanan able-bodied man serving as a member of a possepublishera person engaged in publishing periodicals or books or musicextreme right-winger, reactionary, ultraconservativean extreme conservative; an opponent of progress or liberalismsacred cowa person unreasonably held to be immune to criticismSenhora Portuguese title of respect; equivalent to English `Mr'septuagenariansomeone whose age is in the seventiessexagenariansomeone whose age is in the sixtiesshaveran adult male who shavessignorean Italian title of respect for a man; equivalent to the English `sir'; used separately (not prefixed to his name)sirterm of address for a mansirdaran important person in Indiaslickera person with good manners and stylish clothingbeauty, dish, knockout, looker, lulu, mantrap, peach, ravisher, smasher, stunner, sweethearta very attractive or seductive looking womansocialitea socially prominent personstiffan ordinary mansuna person considered as a source of warmth or energy or glory etcsylpha slender graceful young womanTarzan(sometimes used ironically) a man of great strength and agility (after the hero of a series of novels by Edgar Rice Burroughs)unmarried womana woman who is not marriedVIP, dignitary, high muckamuck, high-up, panjandrum, very important personan important or influential (and often overbearing) personvestala chaste womanWaca member of the Women's Army CorpsWavea member of the women's reserve of the United States Navy; originally organized during World War II but now no longer a separate branchWhiga member of the political party that urged social reform in 18th and 19th century England; was the opposition party to the Toriesphilanderer, womaniser, womanizera man who likes many women and has short sexual relationships with themwonder womana woman who can be a successful wife and have a professional career at the same timeworthyan important, honorable person (word is often used humorously)yuppiea young upwardly mobile professional individual; a well-paid middle-class professional who works in a city and has a luxurious life styledowagera dignified older woman, especially one who has high status or wealthdoyennea woman who is the most experienced, skilled, or respected person in some field
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any mature animal
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(of animals) fully developed“an adult animal”synonyms: big, full-grown, fully grown, grown, grownupmaturehaving reached full natural growth or development
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designed to arouse lustsynonyms: pornographicsexymarked by or tending to arouse sexual desire or interest
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