flat-out

1 of 2

adjective

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

flat out

2 of 2

adverb

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 : absolutely, downright
usually used as an intensive
is just flat-out confusing

Examples of flat-out in a Sentence

Adjective regarded their son-in-law as a flat-out loser and let him know it 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
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.
Adjective
Everyone else is trudging along, if not toiling through a flat-out slump. Jack Harris, Los Angeles Times, 14 Apr. 2025 The improvements in pulling off large set pieces continues to scale from season to season—comparing this battle to the Bel Tine fight back in the first bits of season 1 shows not just better visual effects or whatever, but just flat-out better composition and clearer storytelling. ArsTechnica, 11 Apr. 2025
Adverb
Deputy Latah County Prosecutor Ashley Jennings also flat out denied Taylor's accusations that prosecutors were slow-walking discovery and said everything the defense has asked for has been provided, a point that Taylor conceded in front of the judge. Michael Ruiz, FOXNews.com, 10 Apr. 2025 Rookie of the Year candidate Dylan Crews has fallen flat out of the gate, but Parker and Gore have been good in the first two turns through the rotation. Levi Weaver, New York Times, 8 Apr. 2025 See All Example Sentences for flat-out

Word History

First Known Use

Adjective

1906, in the meaning defined at sense 1

Adverb

1932, in the meaning defined at sense 1

Time Traveler
The first known use of flat-out was in 1906

Browse Nearby Words

Cite this Entry

“Flat-out.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/flat-out. Accessed 24 Apr. 2025.

Last Updated: - Updated example sentences
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