/ grʌndʒ; NAmE / noun [ U ]
1.
( informal ) dirt of any kind
SYN grime
2.
(also ˈgrunge rock ) a type of loud rock music, which was popular in the early 1990s
3.
a style of fashion worn by people who like grunge music, usually involving clothes that look untidy
For more information see the Cultural Guide
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WORD ORIGIN
1960s: back-formation from grungy , perhaps suggested by grubby and dingy .