from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Of, characteristic of, or intended for adults: grown-up movies; a grown-up discussion.
- adj. Having or showing maturity in outlook, attitude, or appearance: a grown-up attitude toward work.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Of, pertaining to, or suitable for adults.
- adj. Having a mature outlook.
- n. An adult.
Sorry, no etymologies found.