nounDownload🔗ShareThe mechanism on a bicycle used to move the chain from one sprocket (gear) to another.Examples:"The cyclist adjusted the derailleur to shift gears while climbing the hill. "vehiclemachinedevicepartsporttechnicalChat with AIVocabulary GamePractice Reading
nounDownload🔗ShareThe entire gearset on a bicycle with such a mechanism.Examples:"The bicycle mechanic adjusted the derailleur to make the gear changes smoother. "vehiclemachineparttechnologyChat with AIVocabulary GamePractice Reading