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

These seemingly small actions can lead to dry grass ignition, potentially sparking a wildfire. —Ca Weather Bot, Sacbee.com, 29 June 2025

The stainless steel drip tray makes cleanup a breeze, and the push-button ignition means no fumbling with lighters (see above). —Francesca Krempa, Travel + Leisure, 26 June 2025

Then, the person took the keys out of the pickup’s ignition. —Kate Linderman, Kansas City Star, 24 June 2025

Liquid Propane Grill Between instant ignition, precise temperature control, and easy cleanup, there are plenty of reasons why people opt for a propane grill. —Mariana Best, Better Homes & Gardens, 16 June 2025

Word History

First Known Use

1612, in the meaning defined at sense 2

Rhymes for ignition

• addition
• admission
• ambition
• attrition
• audition
• clinician
• cognition
• coition
• commission
• condition
• contrition
• dentition

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