cardinal number

Definitions

1. A number used to denote quantity; a counting number; a cardinal.
2. A generalized kind of number used to denote the size of a set, including infinite sets.
3. A word that expresses a countable quantity; a cardinal numeral.

Equivalents

Examples

“The smallest cardinal numbers are 0, 1, 2, and 3.”

“The cardinal number⟳ “three” can be represented as “3” or “three”.”

“This cardinal number⟳ is the smallest of the infinite cardinal numbers; it is the one to which Cantor has appropriated the Hebrew Aleph with the suffix 0, to distinguish it from larger infinite cardinals. Thus the name⟳ of the smallest of infinite cardinals is ℵ₀.”

““Three” is a cardinal number⟳, while “third” is an ordinal number⟳.”

CEFR level