Definitions
1.nounA person, group, or state (etc) which is associated with another for a common cause; one united to another by treaty or common purpose; a confederate."the two countries were allies in WWI"
2.nounA person, group, concept (etc) which is associated with another as a helper; a supporter; an auxiliary.
3.nounAnything akin to something else by structure, etc.
4.nounA closely related species, usually within the same family."Gruiformes — cranes and allies"
5.nounA relative; a kinsman.
6.verbTo unite, or form a connection between, as between families by marriage, or between princes and states by treaty, league, or confederacy.
7.verbTo connect or form a relation between by similitude, resemblance, friendship, or love.