Main Entry:

ig·ni·tion

Pronunciation:

\ig-ˈni-shən\

Function:

noun

Date:

1612

1: the act or action of igniting: as a: the starting of a fire b: the heating of a plasma to a temperature high enough to sustain nuclear fusion 2 a: the process or means (as an electric spark) of igniting a fuel mixture b: a device that activates an ignition system (as in an automobile) <put the key in the ignition>