ordinal number
US /ˈɔːrdɪnl ˈnʌmbər/
UK /ˈɔːrdɪnl ˈnʌmbər/
1.
a number indicating position in a series or order
:
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First, second, and third are examples of ordinal numbers.
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The date can be written using an ordinal number, like 'July 4th'.
a number indicating position in a series or order