flat-out

adjective
\ 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

adverb

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

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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.
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Recent Examples on the Web: Adverb In August, during a normal year, the town sees 60,000 visitors a day—a fact that, considering its size and infrastructure, seems flat out impossible. Jordan Kisner, Travel + Leisure, 26 May 2021 The European bourses are trading sideways with the Stoxx Europe 600 flat, flat, flat out of the gates, before nudging up. Bernhard Warner, Fortune, 9 Apr. 2021 Upholding the xenophobic and racist policies of the Trump admin, incl the historically low + plummeted refugee cap, is flat out wrong. Anna Giaritelli, Washington Examiner, 16 Apr. 2021 Upholding the xenophobic and racist policies of the Trump admin, incl the historically low + plummeted refugee cap, is flat out wrong. Ryan Nobles, CNN, 16 Apr. 2021 Upholding the xenophobic and racist policies of the Trump admin, incl the historically low + plummeted refugee cap, is flat out wrong. Ben Gittleson, ABC News, 16 Apr. 2021 Much of this episode is either confusing or a little muddled or just flat out disappointing. Erik Kain, Forbes, 28 Apr. 2021 Stevenson has rare movement skills for a 246-pound back and can flat out make people miss. Jonas Shaffer, baltimoresun.com, 29 Apr. 2021 Production largely recovered, with most assembly lines running flat out. Paul A. Eisenstein, NBC News, 12 Mar. 2021

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.

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First Known Use of flat-out

Adjective

1906, in the meaning defined at sense 1

Adverb

1932, in the meaning defined at sense 1

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Time Traveler for flat-out

Time Traveler

The first known use of flat-out was in 1906

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Statistics for flat-out

Cite this Entry

“Flat-out.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/flat-out. Accessed 21 Jun. 2021.

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More Definitions for flat-out

flat-out

adjective

English Language Learners Definition of flat-out

 (Entry 1 of 2)

informal
chiefly US : absolute and complete
: greatest possible

flat out

adverb

English Language Learners Definition of flat out (Entry 2 of 2)

informal
chiefly US : in a very clear and direct way
: at the fastest possible speed
US, informal used to make a statement more forceful

flat-out

adjective
\ 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

adverb

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.

More from Merriam-Webster on flat-out

Thesaurus: All synonyms and antonyms for flat-out

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