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grownup

[grohn-uhp]
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noun
  1. a mature, fully grown person; adult.
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Origin of grownup

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

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.
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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

Related Words for grownup

ready, prepared, overdue, mature, plump, tall, person, woman, man, grownup, accomplished, adult, aged, completed, conditioned, consummate, enlightened, enriched, finished, fit

Examples from the Web for grownup

Contemporary Examples of grownup

Historical Examples of grownup

  • This was too big a thing, and too private, to tell a grownup.

    Games

    Katherine MacLean

  • The grownup straightened away from the fence, preparing to walk off.

    Games

    Katherine MacLean

  • His mother, his sister Margaret, and their grownup friends had finished their tea and were approaching from the house.

    Penrod

    Booth Tarkington

  • Onward and still onward to a glorious end, left entirely to myself and entrusted with an important task like a grownup person!

  • He remembered Blanche Seymour as a passionate dancer still when he began to go to grownup parties.


British Dictionary definitions for grownup

grown-up

adjective
  1. having reached maturity; adult
  2. suitable for or characteristic of an adult
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noun
  1. an adult
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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