Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Something that pollutes, especially a waste material that contaminates air, soil, or water.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A foreign substance that makes something dirty, or impure, especially waste from human activities.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. waste matter that contaminates the water or air or soil

Etymologies

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