Definition of unleash verb from the Oxford Advanced American Dictionary

 

unleash

 verb
verb
NAmE//ʌnˈliʃ//
 
unleash something (on/upon somebody/something)Verb Forms present simple I / you / we / they unleash
 
he / she / it unleashes
 
past simple unleashed
 
-ing form unleashing
 
 
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to suddenly let a strong force, emotion, etc. be felt or have an effect The government's proposals unleashed a storm of protest in the press.
See the Oxford Advanced Learner's Dictionary entry: unleash