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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 fraternise
Historical Examples
  • I daresay he thought I might fraternise and forget the past.

    A Mating in the Wilds Ottwell Binns
  • It shows that the stronger are willing to fraternise with the weaker.

    Frank Oldfield T.P. Wilson
  • They both visit us in the cold weather and fraternise with the common crows.

    Birds of the Plains Douglas Dewar
  • We will say to them, 'Soldiers of the mother country, fraternise with us, come and embrace us.'

  • Ayala had, at first, accepted him as a cousin, and had consented to fraternise with him.

    Ayala's Angel

    Anthony Trollope
  • What need for the soldier and the man of science to fraternise just now?

  • I was among those whom he had marked as men he would like to fraternise with.

    Grey Roses

    Henry Harland
  • There are various more or less authentic stories showing the instinct of the armed forces of both nations to fraternise.

  • He then came out of his trenches to fraternise; this was also stopped by the Divisional artillery.

  • Yes; decidedly the best way to enjoy a cab-ride is to sink the bloated aristocrat, mount beside the driver, and fraternise.

    Original Penny Readings George Manville Fenn
British Dictionary definitions for fraternise


(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 fraternise



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 fraternise



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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