English

Definition of bumper adjective from the Oxford Advanced Learner's Dictionary

 

bumper

 adjective
adjective
BrE BrE//ˈbʌmpə(r)//
 
; NAmE NAmE//ˈbʌmpər//
 
 
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[only before noun] (approving) unusually large; producing an unusually large amount a bumper issue (= of a magazine, etc.) a bumper crop/harvest/season/year Farmers have been celebrating bumper crops this year.
See the Oxford Advanced American Dictionary entry: bumper