collision

noun

col·​li·​sion kə-ˈli-zhən How to pronounce collision (audio)
1
: an act or instance of colliding : clash
2
: an encounter between particles (such as atoms or molecules) resulting in exchange or transformation of energy
collisional
kə-ˈlizh-nəl How to pronounce collision (audio)
-ˈli-zhə-nᵊl
adjective
collisionally adverb
Choose the Right Synonym for collision

impact, collision, shock, concussion mean a forceful, even violent contact between two or more things.

impact may be used to imply contact between two things, at least one of which is impelled toward the other.

the glass shattered on impact with the floor

collision implies the coming together of two or more things with such force that both or all are damaged or their progress is severely impeded.

the collision damaged the vehicle

shock often denotes the effect produced by a collision and carries the suggestion of something that strikes or hits with force.

the shock of falling rocks

concussion when not in technical use, often suggests the shattering, disrupting, or weakening effects of a collision, explosion, or blow.

bystanders felt the concussion of the blast

Examples of collision in a Sentence

The car was destroyed in the collision. the collision of two opposing philosophies regarding the rearing of children
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.
Purdue University’s official mascot, the Purdue Boilermaker Special, was involved in a fatal collision on the afternoon of April 24, the Tippecanoe County Sheriff's Office said. Ron Wilkins, USA Today, 26 Apr. 2025 The Slate Truck will also aim for a 5-star crash rating, according to a company spokesperson, and will feature active emergency braking, forward collision warning, and as many as eight airbags. Abigail Bassett, ArsTechnica, 25 Apr. 2025 That could support the defense theory that O'Keefe did not sustain his injuries in a collision with Read's SUV but rather from a possible altercation with another man at the party who had shared his own romantic texts with the defendant, Kenney Baden told Fox News Digital. Michael Ruiz , Julia Bonavita, FOXNews.com, 25 Apr. 2025 Purdue University's Boilermaker Special mascot involved in deadly collision The driver of the city dump truck, 66-year-old Michael Ray Vernon of Eden, was transported to a local hospital with minor injuries, state highway patrol said. Victoria Arancio, ABC News, 25 Apr. 2025 See All Example Sentences for collision

Word History

Etymology

Middle English, from Latin collision-, collisio, from collidere

First Known Use

15th century, in the meaning defined at sense 1

Time Traveler
The first known use of collision was in the 15th century

Browse Nearby Words

Cite this Entry

“Collision.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/collision. Accessed 30 Apr. 2025.

Kids Definition

collision

noun
col·​li·​sion kə-ˈlizh-ən How to pronounce collision (audio)
: an act or instance of colliding

More from Merriam-Webster on collision

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