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

 

trey

 noun
noun
BrE BrE//treɪ//
 
; NAmE NAmE//treɪ//
 
Basketball
 
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(in basketball) a shot that scores three points See related entries: Basketball Word Origin late Middle English: from Old French trei ‘three’, from Latin tres.
See the Oxford Advanced American Dictionary entry: trey