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also grown-up  (grōn′ŭp′)
An adult.


1. having reached the age of maturity.
2. characteristic of or suitable for adults.
grown′-up′ness, n.



a fully grown person; adult.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.grownup - a fully developed person from maturity onwardgrownup - a fully developed person from maturity onward
individual, mortal, person, somebody, someone, soul - a human being; "there was too much for one person to do"
adult body - the body of an adult human being
brachycephalic - an adult with a short broad head
caregiver - a person who is responsible for attending to the needs of a child or dependent adult
catch, match - a person regarded as a good matrimonial prospect
centrist, middle of the roader, moderate, moderationist - a person who takes a position in the political center
eccentric, type, character, case - a person of a specified kind (usually with many eccentricities); "a real character"; "a strange character"; "a friendly eccentric"; "the capable type"; "a mental case"
conservative, conservativist - a person who is reluctant to accept changes and new ideas
dolichocephalic - an adult with a long narrow head
elder, senior - a person who is older than you are
ex-spouse - a person who was formerly a spouse
host - a 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 there
important person, influential person, personage - a person whose actions and opinions strongly influence the course of events
Jack of all trades - a person able to do a variety of different jobs acceptably well
liberal, liberalist, progressive - a person who favors a political philosophy of progress and reform and the protection of civil liberties
liberal - a person who favors an economic theory of laissez-faire and self-regulating markets
adult male, man - an adult person who is male (as opposed to a woman); "there were two women and six men on the bus"
militarist, warmonger - a person who advocates war or warlike policies
disarmer, pacificist, pacifist - someone opposed to violence as a means of settling disputes
patrician - a person of refined upbringing and manners
pledgee - someone to whom a pledge is made or someone with whom something is deposited as a pledge
pledger - someone who makes or gives a pledge
professional, professional person - a person engaged in one of the learned professions
sobersides - a serious and sedate individual
man of the world, sophisticate - a worldly-wise person
homebody, stay-at-home - a person who seldom goes anywhere; one not given to wandering or travel
unemotional person, stoic - someone who is seemingly indifferent to emotions
thoroughbred - a well-bred person
adult female, woman - an adult female person (as opposed to a man); "the woman kept house while the man hunted"
Adj.1.grownup - (of animals) fully developedgrownup - (of animals) fully developed; "an adult animal"; "a grown woman"
animal, animate being, beast, creature, fauna, brute - a living organism characterized by voluntary movement
mature - having reached full natural growth or development; "a mature cell"