transitive. To unite, combine, or join in kinship, friendship, association, etc., esp. for a common purpose or mutual benefit. Also with to, with, ag…

transitive. To unite (persons or states) in a league, bring into alliance, ally; to form into a confederation. Const. with, together, †unto.

transitive. To bring together as a league, for a common purpose; to organize or unite on a federal basis, to make into a federation. Also (and in…