Share this entry

adjunction Line breaks: ad¦junc|tion
Pronunciation: /əˈdʒʌŋkʃ(ə)n/

Definition of adjunction in English:


[mass noun]
1 Mathematics The joining of two sets which without overlapping jointly constitute a larger set, or the relation between two such sets.
Example sentences
  • The problem of de Groot concerned compactifications of spaces by means of an adjunction of a set of minimal dimension.
  • The last piece of this puzzle is the notion of an adjunction.
  • Now we have the notion of an adjunction, along with its unit and counit.
2 Logic The asserting in a single formula of two previously asserted formulae.


Late 16th century: from Latin adjunctio(n)-, from the verb adjungere (see adjoin).

Definition of adjunction in:

Share this entry


What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day innocuous
Pronunciation: ɪˈnɒkjʊəs
not harmful or offensive