Definitions

1. noun

Materials that are highly toxic, radioactive, or otherwise hazardous to health or the environment, especially those requiring special handling and protection.

“The hazmat team was called to the scene to clean up the spill.”

2. adjective

Relating to materials that are highly toxic, radioactive, or otherwise hazardous to health or the environment.

“The hazmat warning on the container indicated that it contained a hazardous substance.”