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

 

bandwagon

 noun
noun
BrE BrE//ˈbændwæɡən//
 
; NAmE NAmE//ˈbændwæɡən//
 
[usually singular]
 
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  • an activity that more and more people are becoming involved in The World Cup bandwagon is starting to roll.
  • Extra examples The Scottish Nationalist bandwagon is gathering pace. The globalization bandwagon is gathering momentum. There is now a bandwagon effect with more and more companies following the trend. They seem to have got an anti-government bandwagon rolling.Idioms
    climb/jump on the bandwagon
     
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    (informal, disapproving) to join others in doing something that is becoming fashionable because you hope to become popular or successful yourself politicians eager to jump on the environmental bandwagon In the US, political parades often included a band on a wagon. Political leaders would join them in the hope of winning popular support.
    See the Oxford Advanced American Dictionary entry: bandwagon