Dictionary and Thesaurus

Definition of Grownup

• (noun) a fully developed person from maturity onward
• (adjective satellite) (of animals) fully developed; "an adult animal"; "a grown woman"

Synonyms of Grownup

• Adult
• Adult
• Big
• Full-Grown
• Fully Grown
• Grown

Antonyms of Grownup

• Juvenile

Homophones of Grownup

• Grown-Up