First Known Use of flat-out
Synonymsall-out, arrant, blank, blooming [chiefly British], bodacious [Southern & Midland], categorical (also categoric), clean, complete, consummate, cotton-picking, crashing, damn, damned, dead, deadly, definite, downright, dreadful, fair, flat, flat-out, out-and-out, outright, perfect, plumb, profound, pure, rank, regular, sheer, simple, stark, stone, straight-out, thorough, thoroughgoing, total, unadulterated, unalloyed, unconditional, unmitigated, unqualified, utter, very
Related Wordsauthentic, classic, genuine, real, veritable; constant, endless, eternal, perpetual, undying, unremitting; extreme, unrestricted; confirmed, habitual, hopeless, inveterate; extraordinary, frightful, horrible, huge, main, superlative, supreme, surpassing, terrible, terrific
Near Antonymsdoubtful, dubious, equivocal, qualified, questionable, restricted, uncertain
Definition of flat out
Examples of flat out in a Sentence
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.
First Known Use of flat out
FLAT-OUT Defined for English Language Learners
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
Definition of flat out for Students
- I told him flat out to leave.
- We worked flat out to finish.
Seen and Heard
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