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[yoo-nuh-fahy] /ˈyu nəˌfaɪ/
verb (used with object), verb (used without object), unified, unifying.
to make or become a single unit; unite:
to unify conflicting theories; to unify a country.
Origin of unify
1495-1505; < Late Latin ūnificāre, equivalent to Latin ūni- uni- + -ficāre -fy
Related forms
unifier, noun
nonunified, adjective
quasi-unified, adjective
reunify, verb (used with object), reunified, reunifying.
ununified, adjective
combine, merge, fuse, coalesce. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for unifying
  • Evolution only affirms that living things are governed by a unifying law.
  • The picture's comic inventiveness lacks a unifying idea, an overriding joke.
  • Corruption in the country is systemic, and the revolutionaries lack unifying political principles.
  • Throughout modern history, the discovery of each new unifying principle in physics has sparked stunning new practical insights.
  • Category theory provides both with a unifying notion and terminology.
  • There should be a unifying set of fundamental concepts that all birds and higher mammals understand.
  • Disagreements and personal disputes among the opposition have stood in the way of such unifying action.
  • These include improving tax collection by unifying the different agencies under a single roof.
  • Sports are a unifying theme for countries across the world.
  • The color was both a unifying symbol and an indication of the level of planning underlying the protests.
British Dictionary definitions for unifying


verb -fies, -fying, -fied
to make or become one; unite
Derived Forms
unifiable, adjective
unifier, noun
Word Origin
C16: from Medieval Latin ūnificāre, from Latin ūnus one + facere to make
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 unifying



c.1500, "to make into one," from Middle French unifier (14c.), from Late Latin unificare "make one," from Latin uni- "one" (see uni-) + root of facere "to make" (see factitious). Related: Unified; unifying. Unified (field) theory in physics is recorded from 1935.

Online Etymology Dictionary, © 2010 Douglas Harper
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