contaminated

adjective

con·​tam·​i·​nat·​ed kən-ˈta-mə-ˌnā-təd 

1

: soiled, stained, corrupted, or infected by contact or association

a contaminated wound

Urine and feces of infected cats and contaminated clothing, bedding, food bowls or toys are also possible modes of transmission.

—Cat Fancy

2

: made unfit for use by the introduction of unwholesome or undesirable elements

Botulinum toxin is a highly lethal substance which causes death, even in developed countries, when contaminated food is improperly canned or stored.

—John Laffin

… the material could be used as a filter for cleaning contaminated drinking water.

—Alexandra Goho

Synonyms

• polluted
• thinned
• diluted
• dilute
• tainted

Examples of contaminated in a Sentence

the hospitals had no choice but to throw out the contaminated blood supply

Recent Examples on the Web

In communities without clean water, families often burn wood to boil contaminated water, contributing to both deforestation and emissions. —Sivan Yaari, Forbes.com, 3 Sep. 2025

The Great Lakes Legacy Act — which aims to address areas of concern in the basin where longtime industrial contamination has caused environmental degradation — has funded 34 remediation projects across the region since 2004, removing or capping almost 7 million cubic yards of contaminated sediment. —Adriana Pérez, Chicago Tribune, 31 Aug. 2025

People can contract the bacteria by ingesting contaminated seafood or water or through an open wound. —N'dea Yancey-Bragg, USA Today, 28 Aug. 2025

This infection cannot be spread from one person to another, and it cannot be contracted by swallowing contaminated water. —Charlotte Phillipp, People.com, 21 Aug. 2025

Word History

Etymology

from past participle of contaminate

First Known Use

1576, in the meaning defined at sense 1

Rhymes for contaminated

• abbreviated
• accelerated
• accentuated
• accommodated
• acculturated
• accumulated
• acidulated
• adjudicated
• administrated
• adulterated
• affiliated
• agglomerated