Meaning of “ordinal (number)” in the English Dictionary

american-english dictionary

"ordinal (number)" in American English

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ordinal (number)noun [ C ]

us /ˈɔr·dən·əl (ˈnʌm·bər)/

a number like 1st, 2nd, 3rd, that shows the position of something in a list of items:

In "She was fifth in the race," "fifth" is an ordinal number.

(Definition of “ordinal (number)” from the Cambridge Academic Content Dictionary © Cambridge University Press)