Cardinality

//kɑːdɪˈnælɪti// noun

noun ·Uncommon ·Advanced level

Definitions

Noun
  1. 1
    The number of elements a given set contains. countable, uncountable

    "The empty set has a cardinality of zero."

  2. 2
    (mathematics) the number of elements in a set or group (considered as a property of that grouping) wordnet
  3. 3
    The number of terms that can inhabit a type; the possible values of a type. countable, uncountable

    "For many types, such as String, the set of possible values is unlimited. Such types have an infinite cardinality."

  4. 4
    The property of a relationship between a database table and another one, specifying whether it is one-to-one, one-to-many, many-to-one, or many-to-many. countable, uncountable
  5. 5
    The status of being cardinalitial countable, uncountable

Synonyms

All synonyms
powerpower

Example

More examples

"A set with the cardinality of the natural numbers is called "countably infinite"."

Etymology

From cardinal + -ity.

Related phrases

cardinal number

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.