Grownup - definition of grownup by The Free Dictionary
https://www.thefreedictionary.com/grownup
WEBadj. 1. having reached the age of maturity. 2. characteristic of or suitable for adults. [1625–35] grown′-up′ness, n. grown•up. (ˈgroʊnˌʌp) n. a fully grown person; adult. [1805–15] Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
DA: 43 PA: 16 MOZ Rank: 83