Grown-up

adj, noun

adj, noun ·2 syllables ·Uncommon ·Advanced level

Definitions

Noun
  1. 1
    An adult. childish, often

    "They stayed together during three dances, went out on to the terrace, explored wherever they were permitted to explore, paid two visits to the buffet, and enjoyed themselves much in the same way as if they had been school-children surreptitiously breaking loose from an assembly of grown-ups."

Adjective
  1. 1
    Adult, physically mature.
  2. 2
    Of, pertaining to, or suitable for adults.
  3. 3
    Having a mature outlook.

Synonyms

All synonyms
grown upmatureadultgrownup18+adultish

Example

More examples

"Now that you are grown-up, you ought to know better."

Related phrases

grown-up point

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.