grown–up

a fully grown person once you turn 12, you get to eat with the grown-ups at Thanksgiving Synonyms grown-upRelated Words middle-ager; ancient, elder, gaffer, graybeard, oldster, old-timer, senior, senior citizenNear Antonyms bairn [chiefly Scottish], child, cub, kid, moppet, tad, toddler, tot, tyke (also tike); baby, infant; adolescent, juvenile, minor, youngling, youngster, youth; preteen, preteen-ager, teen, teenager, teener, teenybopper, tween