alliance: meaning and definitions

A close association of nations or other groups, formed to advance common interests or causes: an alliance of labor unions opposing the bill.

A formal agreement establishing such an association, especially an international treaty of friendship.

A connection based on kinship, marriage, or common interest; a bond or tie: the shifting alliances within a large family.

Close similarity in nature or type; affinity: the ancient alliance between mathematics and music.

The act of becoming allied or the condition of being allied: the church, acting in alliance with community groups.