Definition of blank call noun from the Oxford Advanced Learner's Dictionary

 

blank call

 noun
noun
BrE BrE//ˌblæŋk ˈkɔːl//
 
; NAmE NAmE//ˌblæŋk ˈkɔːl//
 
(Indian English)
 
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a telephone call made by a person who does not give their name and who wants to threaten, annoy or worry somebody