pile·​up | \ˈpī(-ə)l-ˌəp \

Definition of pileup 

1 : a collision involving usually several motor vehicles

2a : a jammed tangled mass or pile (as of motor vehicles or people) resulting from collision or accumulation

b : accumulation

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Examples of pileup in a Sentence

A five-car pileup slowed traffic. a pileup of e-mail messages that needed to be dealt with

Recent Examples on the Web

But Gaviria was involved in a group pileup inside the 3-kilometer zone that neutralizes the impact of accidents and could do nothing to stop Sagan from claiming a six-second overall lead and the yellow jersey. Joseph Wilson, BostonGlobe.com, "Peter Sagan sprints to the finish to win second stage of Tour de France," 8 July 2018 The one person who had managed to crash through the technology pileup? Ali Wentworth, Town & Country, "The Wisdom of Muffie," 7 Jan. 2013 This will let vehicles alert their fellow vehicles to accidents ahead, preventing pileups. Youngky Kim, WSJ, "Smarter Cities and Safer Self-Driving Cars: Imagining Life in 5G," 20 Apr. 2018 The pileup happened at 2:48 p.m. in the southbound lanes of Interstate 93, just before exit 24, State Police Sergeant Paul Sullivan said. Olivia Quintana, BostonGlobe.com, "Three taken to hospital after five-car crash on I-93 in Boston," 24 June 2018 During Mayor Virginia Raggi's tenure at City Hall, the Italian capital has endured an ailing mass transit system and pileups of uncollected trash. Frances D'emilio, Fox News, "Italy's anti-migrant minister steals partner party's show," 8 July 2018 During Mayor Virginia Raggi’s tenure at City Hall, the Italian capital has endured an ailing mass transit system and pileups of uncollected trash. Washington Post, "Italy’s anti-migrant minister steals partner party’s show," 8 July 2018 Riders were enjoying a calm sunny afternoon until a pileup near the front of the peloton with just over 5K left that sent several riders to the tarmac. Joseph Wilson, The Seattle Times, "Gaviria beats Sagan again to claim 2nd Tour win on Stage 4," 10 July 2018 With a flurry of releases sweeping the hip-hop culture by storm during the month of June, one artist who made sure not to get lost in the pileup has been A Boogie wit da Hoodie. Carl Lamarre, Billboard, "A Boogie wit da Hoodie Says He Has Six Records With Young Thug, Teases EP With Tory Lanez: Exclusive," 25 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'pileup.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of pileup

1900, in the meaning defined at sense 1

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Statistics for pileup

Last Updated

8 Dec 2018

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Time Traveler for pileup

The first known use of pileup was in 1900

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More Definitions for pileup



English Language Learners Definition of pileup

: an accident in which several or many vehicles crash into each other

: a large amount of something that has increased gradually over a period of time

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More from Merriam-Webster on pileup

Rhyming Dictionary: Words that rhyme with pileup

Thesaurus: All synonyms and antonyms for pileup

Spanish Central: Translation of pileup

Comments on pileup

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a nest or breeding place

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