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 fraternise

Historical Examples of fraternise

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

  • 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

British Dictionary definitions for fraternise




(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 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