Definition of buff verb from the Oxford Advanced Learner's Dictionary

 

buff

 verb
verb
BrE BrE//bʌf//
 
; NAmE NAmE//bʌf//
 
Verb Forms present simple I / you / we / they buff
BrE BrE//bʌf//
 
; NAmE NAmE//bʌf//
 
he / she / it buffs
BrE BrE//bʌfs//
 
; NAmE NAmE//bʌfs//
 
past simple buffed
BrE BrE//bʌft//
 
; NAmE NAmE//bʌft//
 
past participle buffed
BrE BrE//bʌft//
 
; NAmE NAmE//bʌft//
 
-ing form buffing
BrE BrE//ˈbʌfɪŋ//
 
; NAmE NAmE//ˈbʌfɪŋ//
 
 
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buff something (up) to polish something with a soft cloth She buffed up the brass with a cloth. Word Originverb mid 16th cent.: probably from French buffle, from Italian bufalo, from late Latin bufalus, from earlier bubalus, from Greek boubalos ‘antelope, wild ox’. The original sense in English was ‘buffalo’, later ‘oxhide’ or ‘colour of oxhide’. Phrasal Verbsbuff upbuff somebody up
See the Oxford Advanced American Dictionary entry: buff