# cardinal number meaning

ENWCardinal number

- In mathematics, cardinal numbers, or cardinals for short, are a generalization of the natural numbers used to measure the cardinality (size) of sets. The cardinality of a finite set is a natural number: the number of elements in the set.
- Cardinality is defined in terms of bijective functions. Two sets have the same cardinality if, and only if, there is a one-to-one correspondence (bijection) between the elements of the two sets.
- There is a transfinite sequence of cardinal numbers:
- This sequence starts with the natural numbers including zero (finite cardinals), which are followed by the aleph numbers (infinite cardinals of well-ordered sets). The aleph numbers are indexed by ordinal numbers.

- NounPLcardinal numbers
- A number used to denote quantity; a counting number.
- The smallest
**cardinal numbers**are 0, 1, 2, and 3. - The
**cardinal number**"three" can be represented as "3" or "three".

- The smallest
- (mathematics) A generalized kind of number used to denote the size of a set, including infinite sets.
- (grammar) A word that expresses a countable quantity; a cardinal numeral.
- "Three" is a
**cardinal number**, while "third" is an ordinal number.

- "Three" is a

- A number used to denote quantity; a counting number.

## Definition of __cardinal number__ in English Dictionary

- Part-of-Speech Hierarchy
- Nouns
- Countable nouns

- Countable nouns

- Nouns

Source: Wiktionary

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