contaminant

noun

con·​tam·​i·​nant kən-ˈta-mə-nənt 

: something that contaminates

Synonyms of contaminant

• contamination
• pollutant

Examples of contaminant in a Sentence

a filter to remove contaminants from the drinking water

Recent Examples on the Web

Some food dyes made from natural ingredients can contain contaminants and may pose their own health risks, such as diabetes. — Stephanie Armour, CBS News, 25 Aug. 2026

In Keyport, New Jersey, a community's residents gathered to learn more about an investigation into contaminants found at an industrial park and neighboring former landfill and whether the contaminants could be affecting their air and water. — Dinah Voyles Pulver, USA Today, 21 Aug. 2026

Water filters This pitcher uses Advanced Carbon Core Technology filters to remove up to three times as many contaminants as standard filters. — Bestreviews, Chicago Tribune, 19 Aug. 2026

Temporary low water pressure was monitored during the repair, with samples collected from seven locations in the affected area showing no evidence of contaminants. — Rachel Roberts, Idaho Statesman, 15 Aug. 2026

Word History

Etymology

contamin(ate) + -ant entry 1

First Known Use

1922, in the meaning defined above

Kids Definition

contaminant

noun

con·​tam·​i·​nant kən-ˈtam-ə-nənt 

: something that contaminates

Medical Definition

contaminant

noun

con·​tam·​i·​nant kən-ˈtam-ə-nənt 

: something that contaminates