grown-up grownup • grown-upness · · · Info · Definitions · Synonyms · Characters · · grown-up · · Text Common · · Latin · · Scripts 8 · · Length 2 · · Syllables Definitions · · · (noun) a fully developed person from maturity onward. Synonyms: adult, grownup. · · Noun Definition 1 (verb) become an adult. Synonyms: grow up. · · Verb Definition 1 (adj) (of animals) fully developed. Synonyms: adult, big, full-grown, fully grown, grown, grownup. Examples: "An adult animal." "A grown woman." · · Adjective Definition 1 Synonyms · · · adult · · Synonym 1 grownup · · Synonym 2 big · · Synonym 3 full-grown · · Synonym 4 fully grown · · Synonym 5 grown · · Synonym 6 Characters · · - hyphen-minus U+002D g latin small letter g U+0067 n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 u latin small letter u U+0075 w latin small letter w U+0077