Dictionary
flat–out
adjective \ˈflat-ˌau̇t\
: absolute and complete
: greatest possible
Full Definition of FLAT-OUT
1
: being or going at maximum effort or speed
2
: out-and-out, downright <it was a flat–out lie>
See flat–out defined for English-language learners
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First Known Use of FLAT-OUT
1906
Related to FLAT-OUT
- Synonyms
- all-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
FLAT-OUT Defined for Kids
flat–out
adjective \ˈflat-ˌau̇t\
Definition of FLAT-OUT for Kids
1
: 2out-right 1 <That's a flat-out lie. — Phyllis Reynolds Naylor, Shiloh>
2
: greatest possible <a flat-out effort>
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