[al-ahyz, uh-lahyz]
plural of ally.
(initial capital letter) (in World War I) the powers of the Triple Entente (Great Britain, France, Russia), with the nations allied with them (Belgium, Serbia, Japan, Italy, etc., not including the United States), or, loosely, with all the nations (including the United States) allied or associated with them as opposed to the Central Powers.
(initial capital letter) the 26 nations that fought against the Axis in World War II and, with subsequent additions, signed the charter of the United Nations in San Francisco in 1945.
(initial capital letter) the member nations of NATO. Unabridged


[v. uh-lahy; n. al-ahy, uh-lahy]
verb (used with object), allied, allying.
to unite formally, as by treaty, league, marriage, or the like (usually followed by with or to ): Russia allied itself to France.
to associate or connect by some mutual relationship, as resemblance or friendship.
verb (used without object), allied, allying.
to enter into an alliance; join; unite.
noun, plural allies.
a person, group, or nation that is associated with another or others for some common cause or purpose: Canada and the United States were allies in World War II.
Biology. a plant, animal, or other organism bearing an evolutionary relationship to another, often as a member of the same family: The squash is an ally of the watermelon.
a person who associates or cooperates with another; supporter.

1250–1300; Middle English alien < Anglo-French al(l)ier, aillaier, Old French alier < Latin alligāre to bind to. See alloy

alliable, adjective
preally, noun, plural preallies.
preally, verb, preallied, preallying.

allay, alley, alloy, ally (see synonym study at allay).

1. unify, join, combine, wed. 4. partner, confederate. 6. friend, aide, accomplice, accessory, assistant, abettor; colleague, coadjutor, auxiliary, helper.

4, 6. enemy, foe, adversary. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
allies (ˈælaɪz)
the plural of ally

Allies (ˈælaɪz)
pl n
1.  (in World War I) the powers of the Triple Entente (France, Russia, and Britain) together with the nations allied with them
2.  See also Axis (in World War II) the countries that fought against the Axis. The main Allied powers were Britain and the Commonwealth countries, the US, the Soviet Union, France, China, and Poland

vb (usually foll by to or with) , -lies, -lying, -lied
1.  to unite or be united, esp formally, as by treaty, confederation, or marriage
2.  (tr; usually passive) to connect or be related, as through being similar or compatible
n , -lies, -lying, -lied, -lies
3.  a country, person, or group allied with another
4.  a plant, animal, substance, etc, closely related to another in characteristics or form
[C14: from Old French alier to join, from Latin alligāre to bind to, from ligāre to bind]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

c.1300, from O.Fr. alier "combine, unite," from a differentiated stem of aleier (source of alloy), from L. alligare "bind to" (see alloy). The noun is c.1600 in the sense of "one united with another by treaty or league," from the verb.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Cultural Dictionary

Allies definition

The victorious allied nations of World War I and World War II. In World War I, the Allies included Britain, France, Italy, Russia, and the United States. In World War II, the Allies included Britain, France, the Soviet Union, and the United States.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences for allies
In this way, all were willing to sacrifice their lives for him and become his allies.
A change in the command of the austrians favoured the first move of the allies.
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