grown-ups Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition plural noun. adults or people who are fully developed. Example Sentence There was a lot of grown-ups at the school dance. Spelled with a hyphen. More Example Sentences Grown-ups often make important decisions. Synonyms adults; parents; guardians Antonyms children; kids; youngsters Hear It! Say It! Write It! grown-ups Switch to cursive Start Share with your friends: