The verb unify has 5 senses (first 2 from tagged texts)
1. (5) unify, unite, merge -- (become one; "Germany unified officially in 1990"; "Will the two Koreas unify?")
2. (2) mix, mingle, commix, unify, amalgamate -- (to bring or combine together or with something else; "resourcefully he mingled music and dance")
3. unite, unify -- (bring together for a common purpose or action or ideology or in a shared situation; "the Democratic Patry platform united several splinter groups")
4. unite, unify -- (act in concert or unite in a common purpose or belief)