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.
Kinship generally; close agreement; relation; conformity; resemblance; connection; as, the affinity of sounds, of colors, or of languages.
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.
A relation between species or higher groups dependent on resemblance in the whole plan of structure, and indicating community of origin.
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.
I've been accused of being old before my time more than once. It's true that I've always felt an affinity for, and been comfortable around, older people. I attribute this to a childhood spent around my grandparents - and even a great-grandparent or two. I wouldn't trade those experiences for anything. Jon Meacham