flat-out

adjective \ ˈflat-ˌau̇t \
Updated on: 21 Nov 2017

Definition of flat-out

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

First Known Use of flat-out

1906


flat out

adverb

Definition of flat out

1 : in a blunt and direct manner : openly
  • called flat out for revolution
  • Nat'l Review
2 : at top speed or peak performance
  • the car does 180 m.p.h. flat out
3 usually flat-out play \ˈflat-ˌau̇t\ : absolutely, downright usually used as an intensive
  • is just flat-out confusing

Examples of flat out in a Sentence

  1. I told him flat out that I have no intention of marrying him.

  2. We asked for more time but they refused us flat out.

  3. The car does 180 mph flat out.

Recent Examples of flat out from the Web

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

1932


FLAT-OUT Defined for English Language Learners

flat-out

adjective

Definition of flat-out for English Language Learners

  • : absolute and complete

  • : greatest possible


flat out

adverb

Definition of flat out for English Language Learners

  • : in a very clear and direct way

  • : at the fastest possible speed

  • —used to make a statement more forceful


FLAT-OUT Defined for Kids

flat-out

adjective \ ˈflat-ˌau̇t \

Definition of flat-out for Students

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

flat out

adverb

Definition of flat out for Students

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


Seen and Heard

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