ignition

noun

ig·​ni·​tion ig-ˈni-shən 

1

a

: the device that is used to ignite the fuel mixture in a gasoline engine

put the key in the ignition

b

: the process or means (such as an electric spark) of igniting a fuel mixture

2

: the act or action of igniting: such as

a

: the starting of a fire

b

: the heating of a plasma to a temperature high enough to sustain nuclear fusion

Examples of ignition in a Sentence

There's a problem with the car's ignition.

Recent Examples on the Web

And with a daunting number of acres to manage, the park agencies and conservation groups are focusing on strategic locations that provide ecosystem benefits and can act as a fuel buffer or prevent flammable brush from growing in common ignition areas, like along busy roadways. —Noah Haggerty, Los Angeles Times, 14 Dec. 2024

While this design may decrease performance figures at lower speeds, the explanation continues, ignition efficiency ratings spike significantly when that piston starts to drop. —Kristin Shaw, Popular Science, 5 Dec. 2024

Standing pilot lights are common in older appliances that are not equipped with electronic ignition switches, but if the pilot light goes out then the burners won't ignite and the appliance will not function properly. —Timothy Dale, Better Homes & Gardens, 26 Nov. 2024

Officials urged residents to exercise caution with potential ignition sources such as machinery, cigarettes or matches. —Eduardo Cuevas, USA TODAY, 9 Nov. 2024

Word History

First Known Use

1612, in the meaning defined at sense 2

Kids Definition

ignition

noun

ig·​ni·​tion ig-ˈnish-ən 

1

: the act of igniting

2

: the process or means (as an electric spark) of igniting a fuel mixture

also : an electrical device for operating an ignition system (as in an automobile)

put the key in the ignition