- 1[singular] affinity (for/with somebody/something) affinity (between A and B) a strong feeling that you understand someone or something and like them or it synonym rapport Sam was born in the country and had a deep affinity with nature. Humans have a special affinity for dolphins.
- 2[uncountable, countable] affinity (with somebody/something) affinity (between A and B) a close relationship between two people or things that have similar qualities, structures, or features There is a close affinity between Spanish and Portuguese.
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