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• Allies
  Allies

  plural noun

  (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.
• allies
  allies

  noun

  the plural of ally

Allies

American  

[al-ahyz, uh-lahyz] / ˈæl aɪz, əˈlaɪz /

plural noun

1. (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.

2. 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.

3. the member nations of NATO.

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Allies ¹ British  

/ ˈælaɪz /

plural noun

1. (in World War I) the powers of the Triple Entente (France, Russia, and Britain) together with the nations allied with them

2. (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 See also Axis

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allies ² British  

/ ˈælaɪz /

noun

1. the plural of ally

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Allies Cultural  

1. 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.

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Etymology

Origin of Allies

Plural of ally

Compare meaning

How does allies compare to similar and commonly confused words? Explore the most common comparisons:

• Allies vs. Central Powers

Explanation

In war, allies are friends — specifically, friendly nations — you can trust. Allies are on your side. The main meaning of this word comes from war. Without allies, a country is going to be all alone in a war. Like many other words of war, this term spread beyond the battlefield. A politician trying to pass a law is going to need allies, probably in both political parties. Any time there's a disagreement or conflict, it helps to have allies: if you don't, you're all alone.

Example Sentences

From the Sunday Mail,1 October 1944, the headline reads: "Allies are poised for Autumn assault on Germany".

From BBC • May 4, 2026

Allies say she remains undecided but is taking steps to preserve the option of a campaign.

From Barron's • Apr. 10, 2026

Allies in the Gulf are privately furious with the U.S., according to diplomats and others familiar with the matter.

From The Wall Street Journal • Mar. 14, 2026

President Franklin Delano Roosevelt suddenly announced it at the 1943 Casablanca conference as an aim of the World War II Allies, he did so off the cuff.

From MarketWatch • Mar. 12, 2026

Twenty-five years after its inception, Public Allies is still going strong, with chapters in Chicago and two dozen other cities and thousands of alumni around the country.

From "Becoming" by Michelle Obama

Related Words

• associate
• colleague
• friend
• partner