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[ri-jek-shuh n] /rɪˈdʒɛk ʃən/
the act or process of rejecting.
the state of being rejected.
something that is rejected.
Origin of rejection
1545-55; < Latin rējectiōn- (stem of rējectiō) a throwing back, equivalent to rēject(us) (see reject) + -iōn- -ion
Related forms
nonrejection, noun
prerejection, noun
1, 2. refusal, spurning, dismissal, elimination. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Word Origin and History for rejection

1550s, from French réjection (16c.) or directly from Latin reiectionem (nominative reiectio) "act of throwing back," noun of action from past participle stem of reicere (see reject). In 19c., it also could mean "excrement." Medical transplant sense is from 1954. In the psychological sense, relating to parenting, from 1931.

Online Etymology Dictionary, © 2010 Douglas Harper
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rejection in Medicine

rejection re·jec·tion (rĭ-jěk'shən)

  1. The act of rejecting or the state of being rejected.

  2. The failure of a recipient's body to accept a transplanted tissue or organ as the result of immunological incompatability; immunological resistance to foreign tissue.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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rejection in Culture

rejection definition

A process in which the immune system of a body attacks an organ or tissue, either its own or tissue transplanted into it from another organism. (See xenotransplantation.)

Note: Rejection is the most serious problem faced in surgery involving organ transplants. Drugs are used to suppress the immune system after organ transplant in order to prevent the rejection of and eventual death of the transplanted tissue.
The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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