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

 

grime

 noun
noun
BrE BrE//ɡraɪm//
 
; NAmE NAmE//ɡraɪm//
 
[uncountable]
 
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dirt that forms a layer on the surface of something synonym dirt a face covered with grime and sweat Keep plants healthy by regularly removing any dust and grime from their leaves. Word Origin Middle English: from Middle Low German and Middle Dutch.Extra examples Over the years, the painting has become covered in a thick layer of grime The window sills were covered in dust and grime. Use a soft bristle brush to loosen the grime.
See the Oxford Advanced American Dictionary entry: grime