vt, -nat*ed  -nat*ing  1  :  to soil, stain, or infect by contact or association <bacteria contaminated the wound>   2  :  to make inferior or impure by admixture <air contaminated by sulfur dioxide>  con*tam*i*na*tive adj con*tam*i*na*tor n 
 
 
 
Similar sounding terms:  con·di·ment 
 
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