American English

Definition of unblock verb from the Oxford Advanced American Dictionary

 

unblock

 verb
verb
NAmE//ʌnˈblɑk//
 
unblock somethingVerb Forms present simple I / you / we / they unblock
 
he / she / it unblocks
 
past simple unblocked
 
-ing form unblocking
 
 
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to clean something, for example a pipe, by removing something that is blocking it
See the Oxford Advanced Learner's Dictionary entry: unblock