CARDINALITY

cardinality

(noun) (mathematics) the number of elements in a set or group (considered as a property of that grouping)

Source: WordNet® 3.1

Etymology

Noun

cardinality (plural cardinalities)

(set theory, of a set) The number of elements a given set contains.

(data modeling, databases) 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.

(religion) The status of a cardinal.

Usage notes

(set theory): The cardinality of an infinite set is an infinite cardinal number. The smallest such number, called aleph-null and denoted ℵ₀, describes the natural numbers; the next is aleph-one. While it is known that the cardinality of the real numbers is greater than aleph-null, it is the subject of the still unproven continuum hypothesis that it equals aleph-one.

Synonyms

• (in set theory): power

Source: Wiktionary

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