Meaning of “burnish” in the English Dictionary

"burnish" in British English

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burnishverb [ T ]

uk /ˈbɜː.nɪʃ/ us /ˈbɝː.nɪʃ/

literary to rub metal until it is smooth and shiny

If you burnish something such as your public image, you take action to improve it and make it more attractive:

adjective uk /ˈbɜː.nɪʃt/ us /ˈbɝː.nɪʃt/ literary

smooth and shiny

(Definition of “burnish” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)