grownup

[ grohn-uhp ]
See synonyms for grownup on Thesaurus.com
noun
  1. a mature, fully grown person; adult.

Origin of grownup

1
First recorded in 1805–15; noun use of verb phrase grow up

Other definitions for grown-up (2 of 2)

grown-up
[ grohn-uhp ]

adjective
  1. having reached the age of maturity.

  2. characteristic of or suitable for adults: grown-up behavior; grown-up fiction.

Origin of grown-up

2
First recorded in 1625–35; adj. use of verb phrase grow up

Other words from grown-up

  • grown-upness, noun

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

British Dictionary definitions for grown-up

grown-up

adjective
  1. having reached maturity; adult

  2. suitable for or characteristic of an adult

noun
  1. an adult

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012