Codomain

//ˌkoʊ.doʊˈmeɪn// noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    The target set into which a function is formally defined to map elements of its domain; the set denoted Y in the notation f : X → Y.

    "Definition 2.5. A function is onto if each element of the codomain has at least one element of the domain assigned to it. In other words, a function is onto if the range equals the codomain."

  2. 2
    The target set into which a function is formally defined to map elements of its domain; the set denoted Y in the notation f : X → Y.; The set B. broadly

Synonyms

All synonyms
rangerange

Antonyms

All antonyms
domain

Example

More examples

"Definition 2.5. A function is onto if each element of the codomain has at least one element of the domain assigned to it. In other words, a function is onto if the range equals the codomain."

Etymology

From co- + domain.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.