Ninety

/ˈnaɪnti/

Meaning & Definition

numeral

Ninety can also refer to degrees in a circle, indicating a right angle.

The angle measures ninety degrees.

The number following eighty-nine and preceding ninety-one; it is equal to 90.

She turned ninety years old last month.

A numeral representing the quantity of ninety.

There are ninety students enrolled in the course.

Ninety as an adjective refers to something that is related to the number ninety.

The ninety dollars spent on the dinner was worth it.

Middle English 'nineti', from Old English 'nigon' (nine) + '-ty' (a form denoting a group of ten).

Ninety days:

A period of ninety days, often used in contracts.

Ninety percent:

A percentage often used to denote a majority or significant portion.

Ninety as a reference to age.

He’s got the wisdom of ninety years.

Ninety as a reference to a significant amount or percentage.

She's got ninety upvotes!