ignition

IPA: ɪgnˈɪʃʌn

The act of igniting.
The initiation of combustion.
(automotive, mechanical engineering) A system for activating combustion in a combustion engine.
(automotive) Receptacle for a key used to start the engine in a vehicle.
(physics) The phenomenon of a thermonuclear fusion reaction becoming self-sustaining and no longer requiring external heating.

Examples of "ignition" in Sentences

So, perfect deduction of the environmental disaster now in ignition may be impossible.
The Grandcamp explosion destroyed the Monsanto Chemical Company plant and resulted in ignition of refineries and chemical tanks on the waterfront.
They don't seem to make em with anything but plastic stocks, but I think the electric spark ignition is such a great idea, I'd love to try it out.
Examples of prolonged human combustion are, admittedly, rare but this should not be taken as evidence that an unusual source of ignition is involved.
Moreover, many fire scientists dismiss "ignition" -- whether natural, accidental, or deliberate -- as a relatively trivial factor in their equations.
As I noted in an earlier post, a keyed ignition is far more effective at turning off a runaway engine than a new high-tech keyless engine, not to mention safer.
Livermore physicists have said they hope to reach "ignition" - generating as much fusion energy as is contained in the laser pulse - at a laser energy of 1.2 to 1.3 megajoules, well short of NIF's 1. 8-megajoule capacity.