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

 

unbeaten

 adjective
adjective
BrE BrE//ʌnˈbiːtn//
 
; NAmE NAmE//ʌnˈbiːtn//
 
(sport)
 
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not having been defeated The team are unbeaten in their last four games. They will be putting their unbeaten record to the test next Saturday.
See the Oxford Advanced American Dictionary entry: unbeaten