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[frat-er-nahyz] /ˈfræt ərˌnaɪz/
verb (used without object), fraternized, fraternizing.
to associate in a fraternal or friendly way.
to associate cordially or intimately with natives of a conquered country, enemy troops, etc.
verb (used with object), fraternized, fraternizing.
Archaic. to bring into fraternal association or sympathy.
Also, especially British, fraternise.
Origin of fraternize
1605-15; < French fraterniser < Medieval Latin frāternizāre. See fraternal, -ize
Related forms
fraternization, noun
fraternizer, noun
unfraternized, adjective
unfraternizing, adjective
1. socialize, mingle, mix, consort, hobnob. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for fraternize
Contemporary Examples
Historical Examples
  • In the upshot it proved that they were not yet to fraternize with the Army of the Valley.

    The Long Roll Mary Johnston
  • To fraternize means to make a brother of; to receive into a fraternity.

    Orthography Elmer W. Cavins
  • Next day the National Guards will fraternize with the people!

    Edmond Dants Edmund Flagg
  • I made one more attempt to fraternize with them, and only one.

    Sketches New and Old, Complete Mark Twain (Samuel Clemens)
  • The Russians seemed to fraternize with the French more than with us.

    The British Expedition to the Crimea William Howard Russell
  • No, comrades, if you are going to fraternize, then fraternize everywhere.

  • He was sure that upon recognizing him they would at once fraternize with the invaders.

    By-Ways of War

    James Jeffrey Roche
  • The five sections of the Institute kept to their circle but did not fraternize.

    Two banks of the Seine Fernand Vandrem
British Dictionary definitions for fraternize


(intransitive) often foll by with. to associate on friendly terms
Derived Forms
fraternization, fraternisation, noun
fraternizer, fraterniser, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for fraternize

1610s, "to sympathize as brothers," from French fraterniser, from Medieval Latin fraternizare, from fraternus "brotherly" (see fraternity). Military sense of "cultivate friendship with enemy troops" is from 1897 (used in World War I with reference to the Christmas Truce). Used oddly by World War II armed forces to mean "have sex with women from enemy countries."

A piece of frat, Wren-language for any attractive young woman -- ex-enemy -- in occupied territory. [John Irving, "Royal Navalese," 1946]
Related: Fraternized; fraternizing.

Online Etymology Dictionary, © 2010 Douglas Harper
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Slang definitions & phrases for fraternize



To associate closely with inhabitants of an enemy country, esp to consort sexually with the women (WWII armed forces)

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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