Try Our Apps


Is irregardless a word?


[kahr-dn-al-i-tee] /ˌkɑr dnˈæl ɪ ti/
noun, plural cardinalities. Mathematics.
(of a set) the cardinal number indicating the number of elements in the set.
Origin of cardinality
1930-35; cardinal + -ity Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
Cite This Source
British Dictionary definitions for cardinality


(maths) the property of possessing a cardinal number
(maths, logic) (of a class) the cardinal number associated with the given class. Two classes have the same cardinality if they can be put in one-to-one correspondence
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
Word Origin and History for cardinality

1520s, "condition of being a cardinal," from cardinal (n.) + -ity. Mathematical sense is from 1935 (see cardinal (adj.)).

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
cardinality in Technology

The number of elements in a set. If two sets have the same number of elements (i.e. there is a bijection between them) then they have the same cardinality. A cardinality is thus an isomorphism class in the category of sets.
aleph 0 is defined as the cardinality of the first infinite ordinal, omega (the number of natural numbers).

The Free On-line Dictionary of Computing, © Denis Howe 2010
Cite This Source

Word of the Day

Difficulty index for cardinality

Few English speakers likely know this word

Word Value for cardinality

Scrabble Words With Friends

Nearby words for cardinality