thirteen is one of the 1000 most common headwords.
think - thirteen - thirty
English numbers (edit)
 ←  12 13 14  → 
    Cardinal: thirteen
    Ordinal: thirteenth

Pronunciation

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Determiner

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Determiner
thirteen

  1. (number) (indefinite) (plural) (count) (ordinal thirteenth) Thirteen is the number that is after twelve and before fourteen. In numerals, it is 13.
    Thirteen donuts makes a baker's dozen.
    The thirteen are never alone.

Singular
thirteen

Plural
thirteens

  1. The number 13.
    Three and ten makes thirteen.

Adjective

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Positive
thirteen

Comparative
none

Superlative
none

  1. To be thirteen years old.
    This girl is thirteen.