Home › Words › G › grownupnessgrownupnessgrownupness means adulthood; maturity.EtymologyFrom grownup + -ness.nounAdulthood; maturity.e.g.“Look, the point is, we'll tell them anything we want, and we'll lead our lives any way we want, because we're the ones who will be grownup, and grownupness will work around us, not vice versa.” — 1991, Melanie Thernstrom, The Dead Girl, →ISBN, page 167:Definitions & examples from Wiktionary (CC BY-SA 3.0).Words closest in meaningBy meaning, not spelling — each word's AI semantic fingerprint, nearest first.adultness 81% match — The state or quality of being an adult. vs grownupness →adultivity 74% match — The state or quality of being an adult; majority. vs grownupness →adultship 74% match — The state, condition, character, or conduct of an adult; maturity; adulthood vs grownupness →matureness 72% match — The property of being mature. vs grownupness →adulted 71% match — Completely grown; mature. vs grownupness →adultly 71% match — In an adult manner; not childishly. vs grownupness →adulty 69% match — Resembling or characteristic of an adult. vs grownupness →adulting 67% match — Activities typically associated with adulthood. vs grownupness →