cardinal number
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 number table
2 : the property that a mathematical set has in common with all sets that can be put in onetoone correspondence with it
1591
First Known Use of cardinal number
1591
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
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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Spanish Central: Translation of cardinal number Nglish: Translation of cardinal number for Spanish speakers Britannica.com: Encyclopedia article about cardinal number
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