ignite

verb

ig·​nite ig-ˈnīt How to pronounce ignite (audio)
ignited; igniting
Synonyms of ignitenext

transitive verb

1
a
: to set afire
also : kindle
b
: to cause (a fuel) to burn
2
: to subject to fire or intense heat
especially : to render luminous by heat
3
a
: to heat up : excite
oppression that ignited the hatred of the people
b
: to set in motion : spark
ignite a debate

intransitive verb

1
: to catch fire
2
: to begin to glow
ignitability noun
ignitable adjective
or less commonly ignitible
igniter noun
or less commonly ignitor

Examples of ignite in a Sentence

The fire was ignited by sparks. The paper ignited on contact with sparks. a material that ignites easily Three wins in a row ignited the team. His proposal is igniting opposition.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Transportation Secretary Sean Duffy said in a post on X the Boeing 777 experienced an engine cover separation that ignited the brush fire on the ground and praised first responders for their swift action. Alaa Elassar, CNN Money, 13 Dec. 2025 This single moment ignites a devastating chain of events, revealing how quickly a life-altering decision can fracture and destroy entire families and friendships. Rosemary Rossi, Variety, 13 Dec. 2025 What begins as a shocking tragedy quickly ignites a firestorm that captures national attention. Rosy Cordero, Deadline, 11 Dec. 2025 The fallout of this year's College Football Playoff bracket continues days after the selection committee ignited controversy with its at-large-bid teams. Scott Thompson, FOXNews.com, 10 Dec. 2025 See All Example Sentences for ignite

Word History

Etymology

Latin ignitus, past participle of ignire to ignite, from ignis

First Known Use

1666, in the meaning defined at transitive sense 2

Time Traveler
The first known use of ignite was in 1666

Browse Nearby Words

Cite this Entry

“Ignite.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ignite. Accessed 18 Dec. 2025.

Kids Definition

ignite

verb
ig·​nite ig-ˈnīt How to pronounce ignite (audio)
ignited; igniting
1
a
: to set on fire : light
b
: to cause (a fuel mixture) to burn
2
: to catch fire
3
: to set in motion : spark
ignite a debate
ignitable
-ˈnīt-ə-bəl
adjective
igniter noun
also ignitor

More from Merriam-Webster on ignite

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!