Definition of affinition in English:

affinition

noun

  • The fact of having affinity with something; the formation or recognition of affinity with a person or thing; an instance of this.

Origin

Early 19th century. Apparently an alteration of affinity after words in -ition, e.g. definition.

Pronunciation:

affinition

/ˌafɪˈnɪʃn/