1. (

• fusion ,
• merger ,
• unification

) an occurrence that involves the production of a union ;

2. (

• union ,
• unification

) the state of being joined or united or linked; "there is strength in union" ;

3. (

• union ,
• unification ,
• uniting ,
• conjugation ,
• jointure

) 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" ;