1.the force attracting atoms to each other and binding them together in a molecule;
basic dyes have an affinity for wool and silk
2.(immunology) the attraction between an antigen and an antibody
3.kinship by marriage or adoption; not a blood relationship
4.(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
5.a close connection marked by community of interests or similarity in nature or character;
found a natural affinity with the immigrants
6.inherent resemblance between persons or things
7.a natural attraction or feeling of kinship;
an affinity for politics