impurity
noun
im·pu·ri·ty
(ˌ)im-ˈpyu̇r-ə-tē 
plural impurities
1
: something that is impure or makes something else impure
removing impurities from water
2
: the quality or state of being impure
Examples of impurity in a Sentence
the impurity of the water
The syrup is strained to remove impurities.
The water is free of impurities.
Recent Examples on the Web
Devotees love how the aluminum walls and constant but surprisingly not-too-loud ventilation keep the air inside fresh, as does a charcoal filter designed to absorb airborne impurities that can creep into bottles through their corks or caps.
—
Emily Saladino, Bon Appetit Magazine, 17 Apr. 2026
Facial Cleansing Brushes A gentle facial cleansing brush can remove makeup and impurities more effectively than hands alone.
—Lauren Jarvis-Gibson, Miami Herald, 8 Apr. 2026
Their bestselling Regenerating Cleanser gently polishes away impurities and dullness to reveal a healthy-looking, radiant glow, clinically proven to make skin look brighter, smoother, more hydrated and pores look smaller.
—Tory Johnson, ABC News, 7 Apr. 2026
The manufacturing process can also introduce impurities — like bacteria or heavy metals — into peptide drugs.
—Anjeanette Damon, ProPublica, 3 Apr. 2026
See All Example Sentences for impurity
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Emily Saladino, Bon Appetit Magazine, 17 Apr. 2026
Facial Cleansing Brushes A gentle facial cleansing brush can remove makeup and impurities more effectively than hands alone.
—Lauren Jarvis-Gibson, Miami Herald, 8 Apr. 2026
Their bestselling Regenerating Cleanser gently polishes away impurities and dullness to reveal a healthy-looking, radiant glow, clinically proven to make skin look brighter, smoother, more hydrated and pores look smaller.
—Tory Johnson, ABC News, 7 Apr. 2026
The manufacturing process can also introduce impurities — like bacteria or heavy metals — into peptide drugs.
—Anjeanette Damon, ProPublica, 3 Apr. 2026
See All Example Sentences for impurity
Cite this Entry
“Impurity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/impurity. Accessed 28 Apr. 2026.
Copy CitationKids Definition
impurity
noun
im·pu·ri·ty
(ˈ)im-ˈpyu̇r-ət-ē
plural impurities
1
: the quality or state of being impure
2
: something that is impure or that makes impure
remove impurities from water
Medical Definition
impurity
noun
im·pu·ri·ty
(ˈ)im-ˈpyu̇r-ət-ē
plural impurities
: something that is impure or makes something else impure
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