Affinity may refer to:

Commerce, finance and law

* Affinity (law), kinship by marriage *

Affinity analysis Affinity analysis falls under the umbrella term of data mining which uncovers meaningful correlations between different entities according to their co-occurrence in a data set. In almost all systems and processes, the application of affinity anal ...

, a market research and business management technique * Affinity Credit Union, a Saskatchewan-based credit union * Affinity Equity Partners, an Asian private equity firm * Affinity fraud, a type of scam targeting a specific demographic * Affinity marketing, a method of extending market reach by forming partnerships and cross-selling relationships *

Affinity Partners Affinity Partners is a global investment firm, based in Miami, formed in summer 2021 by Jared Kushner, a senior advisor to Donald Trump during his US presidency. Kushner's firm received commitments of more than $3 billion by the end of 2021 to inv ...

, an American private equity firm

Religion and belief

Affinity (canon law) In Catholic canon law, affinity is an impediment to marriage of a couple due to the relationship which either party has as a result of a kinship relationship created by another marriage or as a result of extramarital intercourse. The relationship ...

, a kinship arising from the sexual intercourse of a man and a woman * Affinity (Christian organisation), network of conservative evangelical churches and Christian agencies * Affinity group, a private, non-commercial and non-governmental organisation formed around a shared interest or goal

Science and technology

* ''Affinity'', the UK's first road-legal solar car, built by Cambridge University Eco Racing * Affinity (mathematics), an affine transformation preserving collinearity *

Affinity (pharmacology) In biochemistry and pharmacology, a ligand is a substance that forms a complex with a biomolecule to serve a biological purpose. The etymology stems from ''ligare'', which means 'to bind'. In protein-ligand binding, the ligand is usually a mo ...

, a characterisation of protein-ligand binding strength *

Affinity (sociology) Affinity in terms of sociology, refers to "kinship of spirit", interest and other interpersonal commonalities. Affinity is characterized by high levels of intimacy and sharing, usually in close groups, also known as affinity groups. It differs f ...

, a shared interest and commitment between persons in groups and/or willingness to associate * Affinity (taxonomy), a suggestion of common descent or type * Affinity chromatography, method of separating a biomolecule from a mixture * Affinity electrophoresis, general name for many analytical methods used in biochemistry and biotechnology * Affinity laws, laws used in hydraulics to express relationships between variables involved in fan or pump performance * Binding affinity, a measure of the interaction of ligands with their binding sites * Chemical affinity, used to describe or characterise elements' or compounds' readiness to form bonds * Electron affinity, energy released on formation of anions * Processor affinity, a computing term for the assignment of a task to a given core of a multicore CPU * Serif Europe's Affinity series of programs ** Affinity Designer, a vector illustration editor ** Affinity Photo, a raster graphics editor ** Affinity Publisher, a desktop publishing application

Media-related

Music

* Affinity (band), a jazz/rock band ** ''Affinity'' (Affinity album) * ''Affinity'' (Bill Evans album) * ''Affinity'' (Haken album) * ''Affinity'' (Oscar Peterson album) * ''Affinity'' (EP), a 2013 EP by the English band Press to Meco * Johnny Alegre A, a jazz collective based in Manila

Other media

* ''Affinity'' (novel), a 1999 novel by Sarah Waters ** ''Affinity'' (film), a 2008 feature film based on the novel * "Affinity" (''Stargate SG-1''), an episode from season 8 of the TV sci-fi spin-off series ''Stargate SG-1'' * '' Elective Affinities'', a novel by Goethe

Other uses

* Affinity (medieval), late medieval retainers of a monarch in "bastard feudalism" *

Affinity, West Virginia Affinity is an unincorporated community in Raleigh County, West Virginia West Virginia is a state in the Appalachian, Mid-Atlantic and Southeastern regions of the United States.The Census Bureau and the Association of American Geographe ...