: a substance that makes land, water, air, etc., dirty and not safe or suitable to use : something that causes pollution
What made you want to look up pollutant? Please tell us where you read or heard it (including the quote, if possible).
Take Our 10-Question Quiz
The commonly misspelled words quiz
How strong is your vocabulary?
The Vocab Quiz Game for iPhone & iPad
"Incredibly fun and addictive. And informative!" User Review, iTunes