Noun affinity has 7 senses
  1. affinity, chemical attraction - the force attracting atoms to each other and binding them together in a molecule; "basic dyes have an affinity for wool and silk"
    --1 is a kind of force
  2. affinity - (immunology) the attraction between an antigen and an antibody
    --2 is a kind of
    attraction, attractive force
  3. affinity, kinship by marriage - kinship by marriage or adoption; not a blood relationship
    --3 is a kind of kinship, family relationship, relationship
    Antonyms: consanguinity, blood kinship, cognation
    --3 has particulars: steprelationship
  4. affinity, phylogenetic relation - (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 is a kind of kinship, family relationship, relationship
  5. affinity, kinship - a close connection marked by community of interests or similarity in nature or character; "found a natural affinity with the immigrants"; "felt a deep kinship with the other students"; "anthropology's kinship with the humanities"
    --5 is a kind of relation
    --5 has particulars: rapport, resonance; sympathy
  6. affinity - inherent resemblance between persons or things
    --6 is a kind of
  7. affinity - a natural attraction or feeling of kinship; "an affinity for politics"; "the mysterious affinity between them"; "James's affinity with Sam"
    --7 is a kind of
    attraction, attractiveness