intransitive verb.
To place in a friendly association, as by treaty.
intransitive verb.
To unite or connect in a personal relationship, as in friendship or marriage.
intransitive verb.
To enter into an alliance.
noun.
One that is allied with another, especially by treaty.
noun.
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noun.
One in helpful association with another: synonym: partner.
noun.
An animal that cooperates with another animal of the same species in an alliance.
noun.
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noun.
The nations allied against the Central Powers of Europe during World War I. They were Russia, France, Great Britain, and later many others, including the United States.
noun.
The nations, primarily Great Britain, France, the Soviet Union, and the United States, allied against the Axis during World War II.