cardinal number

noun

Definition of cardinal number

1 : a number (such as 1, 5, 15) that is used in simple counting and that indicates how many elements there are in an assemblage — see Table of Numbers
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

in the meaning defined at sense 1

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CARDINAL NUMBER Defined for English Language Learners

cardinal number

Definition of cardinal number for English Language Learners

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


CARDINAL NUMBER Defined for Kids

cardinal number

noun

Definition of cardinal number for Students

: a number (as 1, 5, 22) that is used in simple counting and answers the question “how many?”


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