Definition of grown-up
- insisted on wearing grown-up clothes
: no longer young : fully grown
: suitable for adults
: like an adult
: a person who is fully grown
What made you want to look up grown-up? Please tell us where you read or heard it (including the quote, if possible).
Merriam-Webster's New Words Quiz—Fall 2017 Edition!
Test your knowledge - and maybe learn something along the way.TAKE THE QUIZ
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