Dictionary

cardinal number

noun

: a number (such as 1, 2, or 3) that is used in simple counting and shows quantity

Full Definition of CARDINAL NUMBER

1
:  a number (as 1, 5, 15) that is used in simple counting and that indicates how many elements there are in an assemblage — see number table
2
:  the property that a mathematical set has in common with all sets that can be put in one-to-one correspondence with it

First Known Use of CARDINAL NUMBER

1591

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