Definition of unify verb from the Oxford Advanced Learner's Dictionary

  

unify

 verb
verb
BrE BrE//ˈjuːnɪfaɪ//
 
; NAmE NAmE//ˈjuːnɪfaɪ//
 
Verb Forms present simple I / you / we / they unify
BrE BrE//ˈjuːnɪfaɪ//
 
; NAmE NAmE//ˈjuːnɪfaɪ//
 
he / she / it unifies
BrE BrE//ˈjuːnɪfaɪz//
 
; NAmE NAmE//ˈjuːnɪfaɪz//
 
past simple unified
BrE BrE//ˈjuːnɪfaɪd//
 
; NAmE NAmE//ˈjuːnɪfaɪd//
 
past participle unified
BrE BrE//ˈjuːnɪfaɪd//
 
; NAmE NAmE//ˈjuːnɪfaɪd//
 
-ing form unifying
BrE BrE//ˈjuːnɪfaɪɪŋ//
 
; NAmE NAmE//ˈjuːnɪfaɪɪŋ//
 
 
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unify something to join people, things, parts of a country, etc. together so that they form a single unit The new leader hopes to unify the country. the task of unifying Europe a unified transport system Word Origin early 16th cent.: from French unifier or late Latin unificare ‘make into a whole’.Extra examples a step towards a complete, fully unified theory attempts to unify different groups into one political party relatively unified societies The new leader hopes to unify the party. They are addressing themselves to the task of unifying Europe. What we need is a unified transport system.
See the Oxford Advanced American Dictionary entry: unify