• synonyms


[verb uh-lahy; noun al-ahy, uh-lahy]
See more synonyms for ally on Thesaurus.com
verb (used with object), al·lied, al·ly·ing.
  1. to unite formally, as by treaty, league, marriage, or the like (usually followed by with or to): Russia allied itself to France.
  2. to associate or connect by some mutual relationship, as resemblance or friendship.
Show More
verb (used without object), al·lied, al·ly·ing.
  1. to enter into an alliance; join; unite.
Show More
noun, plural al·lies.
  1. 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.
  2. 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.
  3. a person who associates or cooperates with another; supporter.
Show More

Origin of ally

1250–1300; Middle English alien < Anglo-French al(l)ier, aillaier, Old French alier < Latin alligāre to bind to. See alloy
Related formsal·li·a·ble, adjectivepre·al·ly, noun, plural pre·al·lies.pre·al·ly, verb, pre·al·lied, pre·al·ly·ing.
Can be confusedallay alley alloy ally (see synonym study at allay)

Synonyms for ally

See more synonyms for on Thesaurus.com

Antonyms for ally

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

Related Words for allying

comparable, alike, related, sew, bind, unite, mend, fasten, weave, crochet, catch, join, wed, assist, finance, uphold, advocate, favor, encourage, sponsor

Examples from the Web for allying

Contemporary Examples of allying

Historical Examples of allying

British Dictionary definitions for allying


verb (əˈlaɪ) -lies, -lying or -lied (usually foll by to or with)
  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
Show More
noun (ˈælaɪ, əˈlaɪ) plural -lies
  1. a country, person, or group allied with another
  2. a plant, animal, substance, etc, closely related to another in characteristics or form
Show More

Word Origin for ally

C14: from Old French alier to join, from Latin alligāre to bind to, from ligāre to bind
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 allying



late 14c., "relative, kinsman," from ally (v.); mid-15c. in the sense of "one united with another by treaty or league."

Show More



late 13c., "to join in marriage," from Old French alier "combine, unite," from a differentiated stem of aliier (from Latin alligare "bind to;" see alloy). Meaning "to form an alliance, join, associate" is late 14c. Related: allied; allying.

Show More
Online Etymology Dictionary, © 2010 Douglas Harper