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

Other energy experts point out that worsening wildfire risks from climate change have prompted utilities to spend billions of dollars burying power lines and taking other steps to avoid ignitions — dollars that are ultimately charged to customers. —Sammy Roth, Los Angeles Times, 27 Feb. 2025

With just a simple spark and ignition, the fire can grow rapidly and lead to devastating results as recently seen with the Los Angeles County wildfires. —Mona Darwish, Orange County Register, 18 Feb. 2025

Without using his arms or hands, Spencer successfully climbs into the car, buckles his seat belt, starts the ignition and begins driving, using one leg for pedals and the other for the wheel. —Sara Belcher, People.com, 11 Feb. 2025

Now, ignitions are started by power lines, fireworks, cars and heavy equipment. —Lauren Sommer, NPR, 11 Feb. 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