'Contamination' definitions:

Definition of 'contamination'

From: WordNet
noun
The state of being contaminated [syn: contamination, taint]
noun
A substance that contaminates [syn: contaminant, contamination]
noun
The act of contaminating or polluting; including (either intentionally or accidentally) unwanted substances or factors [syn: contamination, pollution] [ant: decontamination]

Definition of 'Contamination'

From: GCIDE
  • Contamination \Con*tam`i*na"tion\ (k[o^]n*t[a^]m`[i^]*n[=a]"sh[u^]n), n. [L. contaminatio.] The act or process of contaminating; pollution; defilement; taint; also, that which contaminates. [1913 Webster]