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English definition of “rude”

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rude

adjective [-er/-est only]  /rud/ us  

rude adjective [-er/-est only] (NOT POLITE)

behaving in a way that hurts other people’s feelings; not polite: I apologized for Ted’s rude behavior. I thought it was rude of him not to introduce me.

rude adjective [-er/-est only] (SUDDEN)

sudden and unpleasant: I’ve lived in Texas most of my life, so it was a rude awakening when I moved to New York.
rudely
adverb  /ˈrud·li/ us  
rudeness
noun [U]  /ˈrud·nəs/ us  
He asked too many questions, and his curiosity verged on rudeness.
(Definition of rude from the Cambridge Academic Content Dictionary © Cambridge University Press)
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