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

 

cornerback

 noun
noun
BrE BrE//ˈkɔːnəbæk//
 
; NAmE NAmE//ˈkɔːrnərbæk//
 
American football
 
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(in American football) a defending player whose position is outside and behind the linebackers See related entries: American football
See the Oxford Advanced American Dictionary entry: cornerback