Definition of picketing noun from the Oxford Advanced Learner's Dictionary

 

picketing

 noun
noun
BrE BrE//ˈpɪkɪtɪŋ//
 
; NAmE NAmE//ˈpɪkɪtɪŋ//
 
[uncountable] Protest
 
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the activity of standing outside the entrance to a building in order to protest about something and stop people from entering the building mass picketing of the factory See related entries: Protest
See the Oxford Advanced American Dictionary entry: picketing