Thesaurus.com
Dictionary.com
Definitions

a

[uh, ey] / ə, eɪ /
ARTICLE
not any particular or certain one of a class or group
Synonyms
STRONGEST
STRONG
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.

The molecule shared some characteristics with fentanyl but had a fundamentally different core structure.

From Science Daily • Jun. 13, 2026

Researchers at Scripps Research are now exploring a very different strategy.

From Science Daily • Jun. 13, 2026

The debate began in late 2025 when a group of astronomers published findings suggesting that evidence for dark energy, the mysterious phenomenon thought to drive the universe's accelerating expansion, was weakening.

From Science Daily • Jun. 13, 2026

"We need countermeasures that are going to work against all these future variants at once, not just one at a time."

From Science Daily • Jun. 13, 2026

Joey is a deeply devout Catholic, so she views her suffering through the lens of her faith.

From "At Last She Stood" by Erin Entrada Kelly




Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "a" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com