To unite or form a connection between (people or things), as between families by marriage, or between states by confederacy, league, or treaty.
Chiefly followed by with: to enter into an alliance or unite for a common aim.
To join or unite (oneself or itself) against, with, etc., someone or something else.
Chiefly followed by to or with: to connect or form a relation to (someone or something) by similarity in features or nature.
Something regarded as connected with or related to another thing by similarity in features or nature.
A person who co-operates with or helps another; an associate; a friend.
A person who, or organization which, supports a demographic group subject to discrimination and/or misrepresentation but is not a member of the group; specifically (LGBT), a person who is not a member of the LGBT+ community but is supportive of it.
A person, group, state, etc., which is associated or united by treaty with another for a common (especially military or political) purpose; a confederate.
An organism which is related to another organism through common evolutionary origin; specifically, a species which is closely related to another species, usually within the same family.
A person, group, concept, etc., which is associated with another as a helper; an auxiliary; a supporter.