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Webster 1913 Edition


Countable

Count′a-ble

(-?-b’l)
,
Adj.
Capable of being numbered.

Webster 1828 Edition


Countable

COUNTABLE

,
Adj.
That may be numbered.

Definition 2021


countable

countable

English

Adjective

countable (not comparable)

  1. Capable of being counted; having a quantity.
  2. (mathematics, of a set) Countably infinite or finite; having a bijection with a subset of the natural numbers.
  3. (mathematics, of a set) Countably infinite; having a bijection with the natural numbers.
  4. (grammar, of a noun) Freely usable with the indefinite article and with numbers, and therefore having a plural form.

Usage notes

The mathematics sense by which finite sets are countable is more common than the sense by which finite sets are not countable.

Synonyms

  • (having a bijection with a subset of the natural numbers): denumerable

Antonyms

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Hypernyms

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See also