indefinite article

an

a, one

I saw an elephant at the zoo.

I saw an elephant at the zoo.

It takes an hour to get there.

It takes an hour to get there.

((singular countable noun beginning with a vowel sound)) used before a noun to refer to a single thing or person I need an umbrella.

Synonyms: a; Antonyms: the

From Old English 'ān' meaning 'one'.

Use 'an' before words starting with a vowel sound (an apple, an hour), and 'a' before consonant sounds (a cat, a university).

This page is designed for learning support. Please use it as a learning reference, not as a formal reference.