Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “ally”


noun [C]    /ˈæl·ɑɪ, əˈlɑɪ/
politics & government a country that has agreed to give help and support to another, esp. during a war, or a person who helps and supports someone else ally    /əˈlɑɪ, ˈæl·ɑɪ/ verb [T always + adv/prep] I refused to ally myself with that mob.
(Definition of ally noun from the Cambridge Academic Content Dictionary © Cambridge University Press)
Focus on the pronunciation of ally

Definitions of “ally” in other dictionaries

Word of the Day


a person or group who receives money, advantages, etc. as a result of something else

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More