plural impurities
1
: the quality or state of being impure
the impurity of the water
moral impurity
2
: an unwanted substance that is found in something else and that prevents it from being pure
The syrup is strained to remove impurities.
The water is free of impurities.
Cite this Entry
“Impurity.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/impurity. Accessed 21 Jun. 2026.
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