- (countable) Two countries are allies if they support, help, and defend each other.
- England and the United States have been allies for most of the last two centuries.
- France got involved in World War I because its ally, Russia, was involved.
- She's heading to Europe to talk with NATO allies about what message the West should send Russia.
- China remains North Korea's most powerful ally.
- We are looking for more chances to work closely with our friends and allies.
- (countable) Two people or groups can also be allies.
- We didn't like each other, but we had the same goals, so we became uneasy allies.
- His party, and its allies in the media, have helped him survive several political scandals.
- He could no longer protect even his closest allies.
- The enemy of my enemy is my ally.
- It's important to identify your key allies.
- (countable) An ally is anything that helps you.
- This little blue pill is your ally in the war against weight gain.
- (transitive) If you ally yourself with someone, you become their ally.
- Some Indian groups allied themselves with the French, others with the English.
- During World War II, the United States was allied with Russia, but after the war, that changed.
- (transitive), (usually passive) If two things are allied, they are related, are connected, or have many similarities.
- The bird was closely allied to the tits of England.