grown-up

[grohn-uhp]
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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

First recorded in 1625–35; adj. use of verb phrase grow up
Related formsgrown-up·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018


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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