Placement of data at incorrect locations in storage, where it generally overlays valid information or a program code and produces bizarre results.

A process in which the chemical composition of a magma changes due to the assimilation of country rocks.

The addition to water of any substance or property that prevents its use without further treatment.

The process or act of soiling with bacteria.

The deposit of radioactive materials, such as fission fragments or radiological warfare agents, on any objective or surface or in the atmosphere.

The fusion of words, resulting in a new word.

Something that contaminates.