unification

英[,juːnɪfɪ'keɪʃ(ə)n] 美[,jʊnəfə'keʃən]

1. an occurrence that involves the production of a union

2. the state of being joined or united or linked;

"there is strength in union"

3. the act of making or becoming a single unit;

"the union of opposing factions"

"he looked forward to the unification of his family for the holidays"