Affinity

What does AFFINITY mean?

1. noun

   (immunology) the attraction between an antigen and an antibody

2. noun

   (anthropology) kinship by marriage or adoption; not a blood relationship

3. noun

   (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”

4. noun

   a close connection marked by community of interests or similarity in nature or character

   “found a natural affinity with the immigrants”

Definitions from WordNet 3.1, Princeton University.