Added 9 October 2026
affinity
/əˈfɪnɪti/ noun
In Latin: affīnitās Wiktionary
noun Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about affinity at Wordnik → Where our words come from →
- (immunology) the attraction between an antigen and an antibody.
- (anthropology) kinship by marriage or adoption; not a blood relationship.
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(biology) state of relationship between organisms or groups of organisms resulting in resemblance in structure or structural parts.
in anatomical structure prehistoric man shows close affinity with modern humans
Origin
From Middle English affinite, from Old French affinité. Ostensibly equivalent to affine + -ity. See also af-.
From Wiktionary, via Kaikki.org (CC BY-SA)