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1. similarity in structure, form, etc., between different animals, plants, or languages
2. Chem
a. the tendency for two substances to combine; chemical attraction
b. a measure of the tendency of a chemical reaction to take place expressed in terms of the free energy change.
3. Biology a measure of the degree of interaction between two molecules, such as an antigen and antibody or a hormone and its receptor
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005


(religion, spiritualism, and occult)

Astrologers use the term affinity to refer to compatibility between certain planets or signs. It is also used to denote attraction between people whose charts interact harmoniously and magnetically with each other.

The Astrology Book, Second Edition © 2003 Visible Ink Press®. All rights reserved.


The extent to which a substance or functional group can enter into a chemical reaction with a given agent. Also known as chemical affinity.
(computer science)
A specific relationship between data processing elements that requires one to be used with the other, where a choice might otherwise exist.
The strength of the attractive forces between an antigen and an antibody.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Lockton Affinity, an affiliate of Lockton Companies, was formed in 1987 to meet the specialized insurance needs of affinity groups, non-profits, associations and franchises.
Affinity Federal Credit Union has more than 20 branches across the tri-state area, Affinity is the largest credit union headquartered in the state of New Jersey,ranking in the top 2% of all credit unions in terms of asset size.
The New name of Affinity Automotive Services was chosen because the definition of Affinity says it all.
I was also surprised and delighted to learn that the initial release of the Franchi Affinity included a left-handed, mirror-image 12 gauge.
affinity spaces should not be set aside as something students deal with outside school hours.
Affinity is the largest credit union headquartered in the state of New Jersey, and its merger with NEA has grown its brick-and-mortar footprint from 16 to more than 20 branches.
Avitide discovers, manufactures, and supplies molecule-specific biopharmaceutical affinity purification solutions.
Flexjet closely collaborated with Affinity Apparel to produce the uniforms.
* Realize the significance of the affinity channel as a method of product distribution.
Affinity Sports has launched Interactive Digital Player Cards for the youth and adult soccer market in the USA, the company said.