Meaning of the word "flat out" in English

What does "flat out" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

flat out

US /flæt aʊt/
UK /flæt aʊt/
"flat out" picture

Adverb

1.

as fast or as hard as possible

Example:
He worked flat out to finish the project on time.
The car was going flat out down the highway.
2.

directly and clearly; without hesitation or reservation

Example:
She told him flat out that she wasn't interested.
He denied the accusation flat out.
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