plural of grown up

past participle of grow out of

plural of grown-up

(medicine) Having lungs that adhere to the pleura.

Having reached complete biological maturity / fully-fledged

past participle of grow out

Having a swollen liver.

Having a covering of growing moss. / (figuratively) Old; old-fashioned, out of date.

Alternative form of grownupness

(US, slang, vulgar) grown-up; adult; often used in reproach of an adult's immaturity, or, conversely, in assertion of maturity.