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 onetoone correspondence with it
Test Your Vocabulary
Words Named After People

 Namesake of the leotard, Jules Léotard had what profession?
Test your visual vocabulary with our 10question challenge!
TAKE THE QUIZA daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
MerriamWebster unabridged
Share cardinal number
Time Traveler for cardinal number
The first known use of cardinal number was in 1801
See more words from the same year