Affinity may refer to:

Commerce, finance and law

Affinity (law) In law and in cultural anthropology, affinity is the kinship relationship created or that exists between two people as a result of someone's marriage. It is the relationship each party in the marriage has to the family of the other party in th ...

, kinship by marriage * Affinity analysis, 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 Affinity fraud is a form of investment fraud in which the fraudster preys upon members of identifiable groups, such as religious or ethnic communities, language minorities, the elderly, or professional groups. The fraudsters who promote affinity ...

, a type of scam targeting a specific demographic *

Affinity marketing Affinity marketing is a concept that consists of a partnership between a company (supplier) and an organization that gathers persons sharing the same interests to bring a greater consumer base to their service, product or opinion. This partnershi ...

, a method of extending market reach by forming partnerships and cross-selling relationships * Affinity Partners, an American private equity firm

Religion and belief

* Affinity (canon law), 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 An affinity group is a group formed around a shared interest or common goal, to which individuals formally or informally belong. Affinity groups are generally precluded from being under the aegis of any governmental agency, and their purposes ...

, 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 Latin ''ligare'', which means 'to bind'. In protein-ligand binding, the ligand is usually ...

, a characterisation of protein-ligand binding strength * Affinity (sociology), 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 Affinity chromatography is a method of separating a biomolecule from a mixture, based on a highly specific macromolecular binding interaction between the biomolecule and another substance. The specific type of binding interaction depends on the ...

, 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 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 Latin ''ligare'', which means 'to bind'. In protein-ligand binding, the ligand is usuall ...

, a measure of the interaction of ligands with their binding sites *

Chemical affinity In chemical physics and physical chemistry, chemical affinity is the electronic property by which dissimilar chemical species are capable of forming chemical compounds. Chemical affinity can also refer to the tendency of an atom or compound to com ...

, used to describe or characterise elements' or compounds' readiness to form bonds *

Electron affinity The electron affinity (''E''ea) of an atom or molecule is defined as the amount of energy released when an electron attaches to a neutral atom or molecule in the gaseous state to form an anion. ::X(g) + e− → X−(g) + energy This differs by si ...

, energy released on formation of anions *

Processor affinity In computer science, processor affinity, also called CPU pinning or cache affinity, enables the binding and unbinding of a process or a thread to a central processing unit (CPU) or a range of CPUs, so that the process or thread will execute only ...

, 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 Affinity Photo is a raster graphics editor developed by Serif Ltd. for iPadOS, macOS, and Windows, alongside Affinity Designer and Affinity Publisher. Development of Affinity Photo started in 2009 as a raster graphics editor for macOS. Its fir ...

, 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''

Other uses

Affinity (medieval) In post-classical history, an affinity was a collective name for the group (retinue) of (usually) men whom a lord gathered around himself in his service; it has been described by one modern historian as "the servants, retainers, and other fol ...

, late medieval retainers of a monarch in "bastard feudalism" * Affinity, West Virginia