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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.

Despite this, Lynn went on to gain a degree and a PHD - and is now an adult advisory board member at the Dyscalculia Network.

From BBC • Apr. 15, 2026

Pereira, who runs the financial tech company, says his longevity offers a glimpse to his own adult sons about what life can be like in their eighth decade.

From The Wall Street Journal • Apr. 13, 2026

She has an adult daughter and a 14-year-old daughter still at home.

From MarketWatch • Apr. 13, 2026

The average adult produces more than a liter of urine and over 100 grams of poo each day.

From Science Daily • Apr. 13, 2026

Betsie cut three slices from the round loaf of bread while I looked around the table trying to decide which adult would be most enthusiastic about my decision to stay at home.

From "The Hiding Place" by Corrie ten Boom




Vocabulary lists containing adult