# cardinal number

> English word · Noun

## 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.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/cardinal-number