Definitions

1. noun

The process by which a substance, especially a fuel, can ignite spontaneously due to chemical or thermal reactions, without the need for an external ignition source.

“The researcher studied the phenomenon of autoignition in diesel engines to improve their safety and efficiency.”

2. noun

A self-sustaining fire or explosion caused by autoignition of a substance.

“The autoignition of the flammable gas led to a catastrophic explosion at the industrial site.”