English Reference
noun

affinity

n.
US /əˈfɪnəti/ UK /ɐfˈɪnɪti/ affin·i·ty UK spelling affinities, affinity's

  1. 01 C1 Advanced Formal

    a natural feeling that you understand or like someone or something very much.

    a spontaneous or natural liking for or identification with something or someone.

    Simple

    From a young age, she felt a strong affinity for classical music and spent hours practicing.

    In context

    The novelist's deep affinity for the rural landscape is evident in the lyrical way she describes the changing seasons.

    Usage

    Often used with the preposition 'for' or 'with'.

  2. 02 C1 Advanced Academic

    a close connection between two things because they have similar qualities or features.

    a similarity of characteristics suggesting a relationship, especially a resemblance in structure or origin.

    Simple

    There is a clear affinity between the two languages, as many of their words share the same roots.

    In context

    Scholars have noted a stylistic affinity between the early works of these two painters, despite their different geographical backgrounds.

    Usage

    Commonly used with 'between'.

  3. 03 C2 Proficiency Technical Science

    the force that makes certain atoms or chemicals join together.

    the tendency of certain substances to combine with others, forming chemical bonds or complexes.

    Simple

    Carbon has a high affinity for oxygen, which is why it burns so easily.

    In context

    The researcher measured the binding affinity of the new drug to ensure it would target the correct receptors in the brain.

  4. 04 C2 Proficiency Technical Computing

    a setting that keeps a computer task running on the same processor to make it faster.

    the tendency or configuration to keep a specific process or task running on a particular CPU core to optimise cache performance.

    Simple

    Setting the processor affinity helped the server handle the heavy traffic more efficiently.

    In context

    By adjusting the thread affinity, the developer was able to reduce latency in the high-frequency trading application.

  5. 05 C2 Proficiency FormalTechnical Law

    a family relationship through marriage rather than by blood.

    the relationship that a person has to the blood relatives of their spouse by virtue of the marriage.

    Simple

    In many legal systems, affinity is treated differently than blood relationships regarding inheritance.

    In context

    The judge had to determine if the witness's relationship by affinity to the defendant constituted a conflict of interest.

    consanguinity

Usage have affinity

While the Yanks have an envious affinity for everything royal, even they tired of the entitled couple’s endless whining about how they were so hard done by.

Toronto Sun· 20 Aug 2026

Yet a portrait always tells us as much about its maker as its muse, and so Cahill moves on to what this painting might reveal of the artist’s own ideas and affinities.

The Guardian· 14 Aug 2026

From Middle English affinite, from Old French affinité. Ostensibly equivalent to affine + -ity.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin Old French affinité
Level C1 · Advanced
Frequency Frequent
Updated