grow up
Britishverb
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to reach maturity; become adult
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to come into existence; develop
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Become an adult, as in Sam wants to be a policeman when he grows up . [First half of 1500s]
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Come into existence, arise, as in Similar social problems grew up in all the big cities . [Late 1500s]
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Become mature or sensible, as in It's time you grew up and faced the facts . This usage may also be in the form of an imperative (as in Don't bite your nails—grow up! ) [Mid-1900s]
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.