\ ˈflat-ˌau̇t How to pronounce flat-out (audio) \

Definition of flat-out

 (Entry 1 of 2)

1 : being or going at maximum effort or speed
2 : out-and-out, downright it was a flat-out lie

flat out


Definition of flat out (Entry 2 of 2)

1 : in a blunt and direct manner : openly called flat out for revolutionNat'l Review
2 : at top speed or peak performance the car does 180 m.p.h. flat out
3 usually flat-out \ ˈflat-​ˌau̇t How to pronounce flat out (audio) \ : absolutely, downright usually used as an intensive is just flat-out confusing

Examples of flat-out in a Sentence

Adverb I told him flat out that I have no intention of marrying him. We asked for more time but they refused us flat out. The car does 180 mph flat out.
Recent Examples on the Web: Adverb Justice Clarence Thomas in a separate opinion flat out said that the court should repeal those rulings. Bob Egelko, San Francisco Chronicle, 19 July 2022 However, several pitchers flat out ignored the stop sign. Xl Media, cleveland, 19 July 2022 Simply put, the burpee misses the mark in so many ways, from functionality to being flat out dangerous. Jeff Tomko, Men's Health, 7 July 2022 What the county council is doing is flat out wrong. Laura Johnston, cleveland, 28 June 2022 This would be the inverse of the 1998 agreement, where the groups’ quota was increased even though most members were producing flat out already, but a Saudi increase could be accommodated. Michael Lynch, Forbes, 2 June 2022 The initial package does not flat out ban assault-style weapons or raise the legal age for buying them, two restrictions many Democratic lawmakers and gun-safety advocates have pushed for. Melissa Chan, NBC News, 14 June 2022 Bernstein’s ability to work flat out, with little rest, and in uncanny coordination under Sussman’s imaginative, constantly theorizing direction that put them well in front of everyone else. Joshua Benton, The Atlantic, 9 June 2022 The Indianapolis 500’s TV rating – for a race that included intrigue around Jimmie Johnson and Romain Grosjean’s debuts and Helio Castroneves’ ‘Drive for 5’ – flat out sunk. Nathan Brown, The Indianapolis Star, 1 June 2022 See More

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

First Known Use of flat-out


1906, in the meaning defined at sense 1


1932, in the meaning defined at sense 1

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Time Traveler for flat-out

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The first known use of flat-out was in 1906

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Dictionary Entries Near flat-out

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Cite this Entry

“Flat-out.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/flat-out. Accessed 19 Aug. 2022.

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More Definitions for flat-out


\ ˈflat-ˌau̇t \

Kids Definition of flat-out

1 : out-right entry 2 sense 1 That's a flat-out lie.— Phyllis Reynolds Naylor, Shiloh
2 : greatest possible a flat-out effort

flat out


Kids Definition of flat out

1 : in a very clear manner I told him flat out to leave.
2 : at top speed We worked flat out to finish.


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