1. (adj) adult, grownup
a fully developed person from maturity onward
Synonyms: grownup, adult
Antonyms: immature
2. (adj) adult, big, full-grown, fully grown, grown, grownup
(of animals) fully developed
Synonyms: bountiful, magnanimous, full-grown, prominent, big, vainglorious, cock-a-hoop, braggy, heavy(p), giving, grownup, grown, large(p), enceinte, bounteous, liberal, self-aggrandizing, swelled, handsome, fully grown, braggart(a), with child(p), bighearted, expectant, heavy(a), great(p), large, bragging(a), bad, freehanded, pornographic, big(a), self-aggrandising, boastful, openhanded, adult, gravid, big(p), crowing
Antonyms: immature
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Synonyms for grownup 
