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

During high risk weather events like Santa Ana winds, utility providers may initiate Public Safety Power Shutoffs (PSPS) to reduce the risk of wildfire ignition. —Cox Communications, San Diego Union-Tribune, 24 Apr. 2026

The kind of ignition interlock device that people charged with DUIs are routinely required to get costs about $75 to $150 to install and roughly $100 a month to monitor. —ABC News, 23 Apr. 2026

There are three separate buttons for the main light, side light strip, and arc ignition control. —Shirl Leigh april 23, New Atlas, 23 Apr. 2026

Officials say dry conditions, low humidity and wind can cause fires to spread quickly, and residents are urged to use caution with any potential ignition sources. —Nora O'Neill, Charlotte Observer, 23 Apr. 2026

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