ordinal number


: a number (such as first, fifth, or 22nd) that is used to show the position of someone or something in a series

Full Definition of ORDINAL NUMBER

:  a number designating the place (as first, second, or third) occupied by an item in an ordered sequence — see number table
:  a number assigned to an ordered set that designates both the order of its elements and its cardinal number

First Known Use of ORDINAL NUMBER



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