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

Synonyms of impurity

• contamination
• contaminant
• pollutant

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

Yellowcake is a concentrated form of uranium after impurities are removed from the raw ore. —CBS News, 28 Mar. 2026

Himalayan pink salt, rich in 80 minerals, works to draw out impurities, while Centella asiatica helps keep everything calm and soothed. —Christa Joanna Lee, Allure, 25 Mar. 2026

These natural origins riddle beach sand with impurities that can absorb light. —John Ballato, The Conversation, 24 Mar. 2026

This can introduce impurities or harmful microorganisms to the bathroom environment as a result. —Ethan Stone, USA Today, 15 Mar. 2026

Word History

First Known Use

15th century, in the meaning defined at sense 1

Rhymes for impurity

• maturity
• obscurity
• security
• biosecurity
• cybersecurity
• immaturity
• insecurity
• prematurity
• purity
• surety

Kids 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