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[uh-fil-ee-ey-shuh n] /əˌfɪl iˈeɪ ʃən/
the act of affiliating; state of being affiliated or associated.
Origin of affiliation
1745-55; < Medieval Latin affīliātiōn- (stem of affīliātiō adoption); see affiliate, -ion
Related forms
interaffiliation, noun
nonaffiliation, noun
preaffiliation, noun
reaffiliation, noun
superaffiliation, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Word Origin and History for affiliation

1751, "adoption," from French affiliation, from Medieval Latin affiliationem (nominative affiliatio), noun of action from past participle stem of Latin affiliare "to adopt a son," from ad- "to" (see ad-) + filius "son" (see filial). Figurative sense of "adoption by a society, of branches" first recorded 1799 (affiliate in this sense is from 1761).

Online Etymology Dictionary, © 2010 Douglas Harper
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