Merriam-Webster Online Dictionary
ignition (noun)1.
the act or action of as - igniting
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
