Af·fin·i·ty n.; pl. Affinities
 1. Relationship by marriage (as between a husband and his wife's blood relations, or between a wife and her husband's blood relations); -- in contradistinction to consanguinity, or relationship by blood; -- followed by with, to, or between.
    Solomon made affinity with Pharaoh.   --1 Kings iii. 1.
 2. Kinship generally; close agreement; relation; conformity; resemblance; connection; as, the affinity of sounds, of colors, or of languages.
    There is a close affinity between imposture and credulity.   --Sir G. C. Lewis.
 2. Companionship; acquaintance. [Obs.]
    About forty years past, I began a happy affinity with William Cranmer.   --Burton.
 4. Chem. That attraction which takes place, at an insensible distance, between the heterogeneous particles of bodies, and unites them to form chemical compounds; chemism; chemical or elective affinity or attraction.
 5. Nat. Hist. A relation between species or higher groups dependent on resemblance in the whole plan of structure, and indicating community of origin.
 6. Spiritualism A superior spiritual relationship or attraction held to exist sometimes between persons, esp. persons of the opposite sex; also, the man or woman who exerts such psychical or spiritual attraction.

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