grown-up

adjective
\ ˈgrōn-ˌəp How to pronounce grown-up (audio) \

Definition of grown-up

 (Entry 1 of 2)

1 : not childish or immature : adult
2 : of, for, or characteristic of adults insisted on wearing grown-up clothes

grown-up

noun

Definition of grown-up (Entry 2 of 2)

: adult

Synonyms & Antonyms for grown-up

Synonyms: Adjective

adult, mature

Synonyms: Noun

adult

Antonyms: Adjective

adolescent, immature

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First Known Use of grown-up

Adjective

1633, in the meaning defined at sense 1

Noun

1813, in the meaning defined above

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Dictionary Entries near grown-up

growling

growly

grown

grown-up

grown-upness

grow on

grow on trees

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Time Traveler for grown-up

The first known use of grown-up was in 1633

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More Definitions for grown-up

grown-up

adjective

English Language Learners Definition of grown-up

 (Entry 1 of 2)

: no longer young : fully grown
: suitable for adults
: like an adult

grown-up

noun

English Language Learners Definition of grown-up (Entry 2 of 2)

somewhat informal : a person who is fully grown

grown-up

adjective
\ ˈgrōn-ˌəp\

Kids Definition of grown-up

 (Entry 1 of 2)

grown-up

noun

Kids Definition of grown-up (Entry 2 of 2)

: an adult person

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More from Merriam-Webster on grown-up

Rhyming Dictionary: Words that rhyme with grown-up

Thesaurus: All synonyms and antonyms for grown-up

Spanish Central: Translation of grown-up

Nglish: Translation of grown-up for Spanish Speakers

Britannica English: Translation of grown-up for Arabic Speakers

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