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

 

bane

 noun
noun
BrE BrE//beɪn//
 
; NAmE NAmE//beɪn//
 
 
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[singular] the bane of somebody/something something that causes trouble and makes people unhappy The neighbours' kids are the bane of my life. The poor train service has been the bane of commuters for years. Word Origin Old English bana ‘thing causing death, poison’, of Germanic origin.
See the Oxford Advanced American Dictionary entry: bane