Thesaurus.com
Dictionary.com
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.

See Examples For:

She said she has three adult children in El Salvador and is helping two of them pay for college.

From Los Angeles Times Sep. 10, 2026

When his adult son who happened to be working at Tatte stopped by with a question, Shaich zeroed in on a shadow of stubble he spotted.

From The Wall Street Journal Sep. 10, 2026

Assuming there are roughly 240 million adult U.S. citizens, the price tag would be $1.2 trillion.

From MarketWatch Sep. 10, 2026

"We talk a lot about the power of one caring adult in a child's life, and that could be a teacher or member of staff within the school," said Alistair Cope, head of Foster Wales.

From BBC Sep. 9, 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

China has a large—and growing—obesity problem and counts nearly 150 million diabetic adults.

From The Wall Street Journal Sep. 11, 2026

There are nearly 270 million American adults, which means a $5,000 payout would cost the US government some $1.3 trillion.

From BBC Sep. 10, 2026

There are about 276.8 million adults aged 18 and over in the United States, according to Congressional Budget Office data, and doling out $5,000 to each would come to $1.384 trillion.

From Barron's Sep. 10, 2026

According to the Census, 79% of the U.S. population of 342 million, as of last July, was 18 years or older, which means 270 million adults.

From MarketWatch Sep. 10, 2026

They both wore tightly wrapped robes and the groggy, distressed expressions of adults who hadn’t expected to be awakened.

From "The School for Whatnots" by Margaret Peterson Haddix




Vocabulary lists containing adult


Vocabulary.com logo
by dictionary.com

Dictionary.com's Learning Companion

Go beyond just looking up words.
Remember them forever with VocabTrainer.

Start training