verb (used without object), frat·er·nized, frat·er·niz·ing.

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), frat·er·nized, frat·er·niz·ing.

Archaic. to bring into fraternal association or sympathy.

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

Synonyms for fraternize Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for fraternization

Historical Examples of fraternization

  • We are to succeed in the French mode, by the system of fraternization—all is French.

  • Better yet, where in all Fiji was fraternization more simple?

    The Pacific Triangle

    Sydney Greenbie

  • This was the answer to Redmond's proposal of fraternization.

  • The fraternization which is developing on the front can easily turn into such a trap.


    John Spargo

  • Its privilege—its duty rather—is to ignore all applicants to fraternization that cannot return what it receives.

    Mizora: A Prophecy

    Mary E. Bradley

British Dictionary definitions for fraternization




(intr often foll by with) to associate on friendly terms
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 fraternization

1792, "act of uniting as brothers," from French fraternization (see fraternity); of relations between occupying soldiers and occupied civilians, from mid-19c; explicitly from 1944 (see 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