noun
-
the act or process of initiating combustion
-
the process of igniting the fuel in an internal-combustion engine
-
the devices used to ignite the fuel in an internal-combustion engine
Other Word Forms
- reignition noun
Etymology
Origin of ignition
1605–15; Medieval Latin ignītiōn- (stem of ignītiō ) a setting on fire. See ignite, -ion
Explanation
An ignition is the firing up of something, usually an engine. Without ignition, your vehicle isn't going anywhere. You know how igniting is setting something on fire? That should help you remember that ignition means something is catching fire, like the gadget that ignites the fuel in an internal-combustion engine. Turning the key in a car causes ignition: now the car has started. If the car's battery is dead or there's no gas, ignition isn't possible, and the car won't start. To remember what ignition is, just say the catchphrase of the Human Torch: "Flame on!"
Vocabulary lists containing ignition
Inferno Lingo: Fire Vocabulary
Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!
Elements of the Universe: Ign, Igni ("Fire")
Interested in learning more words like this one? Our team at Vocabulary.com has got you covered! You can review flashcards, quiz yourself, practice spelling, and more – and it's all completely free to use!
Long-Awaited Words from Harper Lee's "Go Set a Watchman"
Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The engines enable faster missile launches as they require little preparation before ignition.
From Barron's • Mar. 29, 2026
Each person had a specific task, from hand-carrying the ignition devices into the EU, to supplying cars.
From BBC • Mar. 11, 2026
But despite the assemblage of first-rate parts, ignition proves elusive.
From The Wall Street Journal • Mar. 5, 2026
Both leukotrienes and pseudo leukotrienes trigger inflammation by binding to the same receptor, much like a key turning an ignition to start an engine.
From Science Daily • Jan. 27, 2026
He looks away and turns the key in the ignition.
From "Saints and Misfits" by S.K. Ali
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
