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Webster 1913 Edition

Noun.

[L.

adjunctio

, fr.

adjungere

: cf. F.

adjonction

, and see

The act of joining; the thing joined or added.

Noun.

The act of joining; the thing joined.

adjunction ‎(plural adjunctions)

The act of joining; the thing joined or added.
(category theory) A form of similarity between a pair of categories, which are mapped to each other by a pair of adjoint functors which come with a related pair of natural transformations called unit and counit which satisfy a pair of triangular identities.
(law) The joining of personal property owned by one to that owned by another.

the act of joining

the thing joined or added

a form of similarity between a pair of categories mapped to each other by dual morphisms