• synonyms


verb (used without object), frat·er·nized, frat·er·niz·ing.
  1. to associate in a fraternal or friendly way.
  2. to associate cordially or intimately with natives of a conquered country, enemy troops, etc.
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verb (used with object), frat·er·nized, frat·er·niz·ing.
  1. Archaic. to bring into fraternal association or sympathy.
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Also especially British, frat·er·nise.

Origin of fraternize

1605–15; < French fraterniser < Medieval Latin frāternizāre. See fraternal, -ize
Related formsfrat·er·ni·za·tion, nounfrat·er·niz·er, nounun·frat·er·nized, adjectiveun·frat·er·niz·ing, adjective


Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for fraternising

Historical Examples

  • But, as things were, he abstained from fraternising and continued to goggle dumbly.

    Indiscretions of Archie

    P. G. Wodehouse

  • Catch me fraternising again with any of them; a disreputable set of scoundrels with never a shirt to their back.

  • And there must be no stretching the assimilation to the length of either concealing truth or fraternising in evil.

  • The doctor departed from the ceremony, fraternising with Campbell, and kept his bed for eight-and-forty hours.

    Devil-Worship in France

    Arthur Edward Waite

  • They looked upon each other as brothers, and the outposts of both armies were fraternising.

British Dictionary definitions for fraternising



  1. (intr often foll by with) to associate on friendly terms
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Derived Formsfraternization or fraternisation, nounfraternizer or 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

Word Origin and History for fraternising



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.

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Online Etymology Dictionary, © 2010 Douglas Harper