ally
To unite or form a connection between (people or things), as between families by marriage, or between states by confederacy, league, or treaty.
Other meanings
To join or unite (oneself or itself) against, with, etc., someone or something else.
Example sentences
Word history
From Latin "alligāre".
Where this comes from
This definition is adapted from “ally” on Wiktionary, by its contributors; example sentences are from Tatoeba, credited to their authors above, published under CC BY-SA 4.0. This page is published under the same licence.