noun

1. Dirt or filth, especially when difficult to clean.

   “The cinema floor was covered in grunge deposited by the crowds.”

2. The state of being filthy; grubbiness.

   “Chad used to work as a coal miner, but couldn't handle the constant grunge.”

3. A subgenre of alternative rock, originating from Seattle, Washington, which melds punk and metal.

   “Alice liked to wear plaids and ripped jeans, and listen to grunge.”