unification

noun

1. the process of unifying or uniting; union: the unification of the 13 original colonies.
2. the state or condition of being unified: The unification of the manufacturing and distribution functions under one executive has advantages.

noun

1. an act, instance, or process of uniting
2. the state of being united

n.1851, noun of action from unify. Unification Church was founded 1954.