affinity Definition

relationship by marriage

sympathy marked by community of interest : kinship

an attraction to or liking for something

of, relating to, involving, or used in affinity chromatography

a credit card which is issued in affiliation with a participating organization (such as a charity or an airline) and the use of which earns a benefit for the organization or the cardholder

chromatography in which a macromolecule (such as a protein) is isolated and purified by passing it in solution through a column treated with a substance having a ligand for which the macromolecule has an affinity that causes it to be retained on the column

a group of people having a common interest or goal or acting together for a specific purpose (as for a chartered tour)