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English numbers (edit)
900
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9
    Cardinal: ninety
    Ordinal: ninetieth

Pronunciation change

Determiner change

Determiner
ninety

  1. (number) (indefinite) (plural) (count) (ordinal ninetieth) Ninety is an even number. In numerals, it is 90.
    Ninety years ago, things were different.

Noun change

Singular
ninety

Plural
nineties

  1. The number 90.
    Ninety is ten less than hundred and forty more than fifty.
  2. To be 90 years old.
    My grandfather is ninety.