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Definitions

adult

[uh-duhlt, ad-uhlt] / əˈdʌlt, ˈæd ʌlt /
ADJECTIVE
being mature, fully grown
Synonyms
Antonyms


NOUN
a mature, fully grown person
Synonyms
STRONGEST
STRONG
grownup
WEAK
Antonyms


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Sklar’s two adult children, appropriately enough, hate him, but it’s unclear whether he hated them first.

From The Wall Street Journal • Apr. 9, 2026

The severity of Emma’s teenage plan is analyzed against the kind person she’s proven herself to be as an adult.

From Salon • Apr. 9, 2026

The first involved an adult male and two kits sourced from Scotland.

From BBC • Apr. 7, 2026

“The West Wing” actor Busfield has three adult children from two previous marriages and is the stepfather to Gilbert’s two adult sons from her two previous marriages.

From Los Angeles Times • Apr. 6, 2026

Lizzie was six or seven, and for weeks she ordered every adult she saw to bend down so she could search their head for hidden writing.

From "The Bletchley Riddle" by Ruta Sepetys and Steve Sheinkin




Vocabulary lists containing adult