- To unite, or form a connection between, as between families by marriage, or between princes and states by treaty, league, or confederacy; -- often followed by to or with."O chief! in blood, and now in arms allied." [Pope.]
- To connect or form a relation between by similitude, resemblance, friendship, or love."These three did love each other dearly well, And with so firm affection were allied." [Spenser.]"The virtue nearest to our vice allied." [Pope.]
Note: ☞ Ally is generally used in the passive form or reflexively.
Etymology: OE. alien, OF. alier, F. alier, fr. L. alligare to bind to; ad + ligare to bind. Cf. Alligate Alloy Allay Ligament