Affinity1. (n.) 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.
2. (n.) Kinship generally; close agreement; relation; conformity; resemblance; connection; as, the affinity of sounds, of colors, or of languages.
3. (n.) Companionship; acquaintance.
4. (n.) That attraction which takes place, at an insensible distance, between the heterogeneous particles of bodies, and unites them to form chemical compounds; chemistry; chemical or elective affinity or attraction.
5. (n.) A relation between species or higher/ groups dependent on resemblance in the whole plan of structure, and indicating community of origin.
6. (n.) 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.
Thesaurus Entries
a thing for, accord, accordance, addition, adduction, adjunct, affairs, affiliation, agape, agreement, alikeness, alliance, allurement, amity, analogy, approximation, aptitude, aptness, assemblage, assent, association, attractance, attraction, attractiveness, attractivity, bag, bent, bias, bond, bonds of harmony, brotherly love, capillarity, capillary attraction, caritas, cast, cement of friendship, centripetal force, charity, chorus, chosen kind, chumminess, closeness, coherence, coincidence, combination, communion, community, community of interests, comparison, compatibility, conatus, concert, concord, concordance, conduciveness, conformance, conformation, conformity, congeneracy, congeniality, congruence, congruency, congruity, connateness, connaturality, connaturalness, connature, connectedness, connection, consistency, consonance, consort, contiguity, contrariety, cooperation, correspondence, cup of tea, dealings, deduction, delight, diathesis, disjunction, disposition, drag, draw, druthers, eagerness, empathy, equivalence, esprit, esprit de corps, familiarity, family connection, family favor, family likeness, fancy, fascination, favor, feeling for, feeling of identity, fellow feeling, fellowship, filiation, fondness, frictionlessness, friendliness, generic resemblance, good vibes, good vibrations, gravitation, gravity, happy family, harmony, homology, identity, inclination, inseparableness, intercourse, intersection, intimacy, intimate acquaintance, junction, kinship, leaning, liability, liaison, like-mindedness, liking, link, linkage, linking, love, magnetism, marital affinity, marriage connection, marriage relationship, mateyness, mutual affinity, mutual attraction, mutuality, nearness, oneness, overlap, palliness, parallelism, partiality, particular choice, peace, penchant, personal choice, predilection, predisposition, preference, prejudice, prepossession, probability, proclivity, proneness, propensity, propinquity, proximity, pull, pulling power, rapport, rapprochement, readiness, reciprocity, relatedness, relation, relations, relationship, resemblance, self-consistency, semblance, sensitivity to, sharing, similarity, simile, similitude, soft spot, solidarity, special affinity, style, susceptibility, symmetry, sympathy, symphony, sync, synchronism, tally, taste, team spirit, tendency, thing, tie, tie-in, timing, traction, tropism, tug, turn, twist, type, understanding, uniformity, union, unison, unisonance, unity, warp, weakness, willingness