noun companionship; acquaintance.
2. affinity ·noun a relation between species or highe/ groups dependent on resemblance in the whole plan of structure, and indicating community of origin.
3. affinity ·noun kinship generally; close agreement; relation; conformity; resemblance; connection; as, the affinity of sounds, of colors, or of languages.
4. affinity ·noun 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.
5. affinity ·noun 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.
6. affinity ·noun 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.