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  2. to make something less pure or make it poisonous: The disease can be caused by a variety of viruses, bacteria, and other small organisms that contaminate food or water.

  3. If something is contaminated by waste, dirt, chemicals, or radiation, it is made dirty or harmful. Have any fish been contaminated in the Arctic Ocean? [ be VERB -ed ]

  4. 1. a. : to soil, stain, corrupt, or infect by contact or association. Bacteria contaminated the wound. b. : to make inferior or impure by admixture. iron contaminated with phosphorus. 2. : to make unfit for use by the introduction of unwholesome or undesirable elements.

  5. to make impure or unsuitable by contact or mixture with something unclean, bad, etc.: to contaminate a lake with sewage. Synonyms: corrupt, poison, infect, taint, pollute, defile. to render harmful or unusable by adding radioactive material to: to contaminate a laboratory.

  6. The verb contaminate means the same as pollute. Whether it’s food, air, or water, when you contaminate something, you make it impure or hazardous.

  7. CONTAMINATION definition: 1. the process of making something dirty or poisonous, or the state of containing unwanted or…. Learn more.

  8. contaminate something (with something) to make a substance or place dirty or no longer pure by adding a substance that is dangerous or carries disease synonym adulterate The drinking water has become contaminated with lead.

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