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

 

tranche

 noun
noun
BrE BrE//trɑːnʃ//
 
; NAmE NAmE//trɑːnʃ//
 
(finance, British English)
 
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one of the parts into which an amount of money or a number of shares in a company is divided the first tranche of the company’s new share issue Word Origin late 15th cent.: from Old French, literally ‘slice’.