Definitions of affinity

  1. kinship by marriage or adoption; not a blood relationship
  2. a natural attraction or feeling of kinship; " an affinity for politics"; " the mysterious affinity between them"; " James's affinity with Sam"
  3. the force attracting atoms to each other and binding them together in a molecule; " basic dyes have an affinity for wool and silk"
  4. ( immunology) the attraction between an antigen and an antibody
  5. 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"
  6. ( 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"
  7. Kinship generally; close agreement; relation; conformity; resemblance; connection; as, the affinity of sounds, of colors, or of languages.
  8. Companionship; acquaintance.
  9. 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.
  10. 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.
  11. 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.
  12. A relation between species or highe groups dependent on resemblance in the whole plan of structure, and indicating community of origin.
  13. Nearness of kin, agreement, or resemblance: relationship by marriage, opposed to consanguinity or relationship by blood: ( chem.) the peculiar attraction between the atoms of two simple substances that makes them combine to form a compound.
  14. Relation by marriage; chemical attraction.
  15. Natural inclination; chemical attraction.
  16. Relationship by marriage, in contradistinction to consanguinity or relationship by blood; agreement; connection; the tendency which the particles of dissimilar bodies have to combine and form new compounds; resemblance in structure.
  17. Relation; agreement; relationship by marriage; in chem., the combining power of bodies.
  18. Relationship; similarity in all essential organs.