grownup

[ grohn-uhp ]
/ ˈgroʊnˌʌp /

noun

a mature, fully grown person; adult.

Origin of grownup

First recorded in 1805–15; noun use of verb phrase grow up

Definition for grownup (2 of 2)

grown-up
[ grohn-uhp ]
/ ˈgroʊnˈʌp /

adjective

having reached the age of maturity.
characteristic of or suitable for adults: grown-up behavior; grown-up fiction.

Origin of grown-up

First recorded in 1625–35; adj. use of verb phrase grow up

OTHER WORDS FROM grown-up

grown-up·ness, noun

Example sentences from the Web for grownup

British Dictionary definitions for grownup

grown-up

adjective

having reached maturity; adult
suitable for or characteristic of an adult

noun

an adult