A11K

Fifty

UK /["/ˈfɪfti/"]/US /["/ˈfɪfti/"]/

Definition

50

In simple words: The number after forty-nine and before fifty-one.

Examples

She was born in the fifties.
He retired in his fifties.

Usage notes

Used in counting or describing quantities. Appropriate in formal and informal contexts. Avoid using in slang phrases unless specific.

Grammar pattern

number + standalone

Memory hint

Fifty has two fives side by side — imagine two high fives!

Collocations

fifty percent
fifty dollars
fifty years
fifty states
fifty minutes

Synonyms

fifty pieces
five tens
half a hundred

Antonyms

zero
none

Common mistakes

Confused with 'fifteen' due to similar sound.
Incorrectly spelled as 'fiftye'.
Omitted when listing numbers.