Word.ws English Dictionary

disjoint unions

disjoint unions is the plural of disjoint union.

Meaning of disjoint union

Noun

disjoint union (plural disjoint unions)

  1. A union of sets forced to be disjoint by attaching information referring to the original sets to their elements (i.e., by using indexing).
    Synonyms:
    discriminated union
  2. A union of sets which are already pairwise disjoint.
    Synonyms:
    discriminated union
  3. The disjoint union of the underlying sets of a given family of topological spaces, equipped with a topology.
    Synonyms:
    coproduct, direct sum, free sum, free union, topological sum

Questions about disjoint unions

What is disjoint unions the plural of?
Disjoint unions is the plural of disjoint union.

Words near disjoint unions in the dictionary

  1. disjoint set
  2. disjoint sets
  3. disjoint union
  4. disjoint union topologies
  5. disjoint union topology
  6. disjoint unions
  7. disjointed
  8. disjointedly
  9. disjointedness
  10. disjointednesses
  11. disjointing

Source and license

Adapted from Wiktionary: disjoint unions (page history and authors); disjoint union (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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