flat–out

play
adjective \ˈflat-ˌau̇t\

Definition of flat–out

  1. 1 :  being or going at maximum effort or speed

  2. 2 :  out-and-out, downright it was a flat–out lie

1906

First Known Use of flat–out

1906


FLAT–OUT Defined for English Language Learners

flat-out

play
adjective

Definition of flat–out for English Language Learners

  • : absolute and complete

  • : greatest possible


FLAT–OUT Defined for Kids

flat–out

play
adjective \ˈflat-ˌau̇t\

Definition of flat–out for Students

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

  2. 2 :  greatest possible a flat-out effort


Learn More about flat–out


Seen and Heard

What made you want to look up flat–out? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

to glide in or as if in an airplane

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

  • istock-refers-to-this-as-a-tumble-of-strawberries-which-sounded-pretty-nice-to-us
  • Which is a synonym of garner?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!