adj. 1 level, horizontal, even, smooth, plane, unbroken, uninterrupted I looked out over the flat surface of the frozen bay 2 prostrate, prone, supine, lying (down), stretched out, recumbent, outstretched, reclining, spread-eagle(d), spread out, outspread I lay flat on my back staring up at the sky 3 collapsed, levelled, overthrown, laid low The air raid had left all the buildings completely flat 4 downright, outright, unqualified, unreserved, unconditional, absolute, categorical, explicit, unconditional, definite, firm, positive, out-and-out, unequivocal, peremptory, unambiguous, unmistakable, direct, complete, total The request for clemency was met with the judge's flat refusal 5 featureless, monotonous, dull, dead, uninteresting, unexciting, vapid, bland, empty, two-dimensional, insipid, boring, tiresome, lifeless, spiritless, lacklustre, prosaic, stale, tired, dry, jejune The critics wrote that she turned in a very flat performance 6 deflated, collapsed, punctured, ruptured, blown out We had a flat tyre on the way 7 unchangeable, unchanging, invariable, unvaried, unvarying, standard, fixed, unmodified, unmodifiable, Colloq US cookie-cutter They charge the same flat rate for children, the elderly, and all between 8 dead, insipid, stale, tasteless, flavourless, unpalatable; decarbonated, non-effervescent My beer has gone flat 9 exact, precise It's a flat ten minutes from here to the railway station 10 definite, certain, sure, irrevocable I said I'm not going, and that's flat 11 dull, slow, sluggish, inactive, depressed Business has been a bit flat since Christmas 12 dull, mat or matt or matte, unshiny, non-gloss(y), non-reflective, non-glare, unpolished The table looks better with a flat finish 13 lacking perspective, two-dimensional, lifeless, unrealistic Some of his paintings seem pretty flat to me
n. 14 Often, flats. a US low shoes, loafers, sandals, Colloq flatties Cynthia said that wearing flats makes her feet hurt b lowland(s), plain(s), tundra, steppe(s), prairie(s), savannah or savanna, heath, moor, pampas; mud-flat(s); shallow(s), shoal, strand; marsh, bog, fen, swamp Before us was a large flat of barren ground 15 rooms, suite, apartment How can you afford to keep a flat in London?
adv. 16 absolutely, completely, categorically, utterly, wholly, uncompromisingly, irrevocably, positively, definitely, directly; exactly, precisely, flatly He has come out flat in favour of the status quo When he started drinking, she left him flat. 17 flat out. a at maximum or top or full or breakneck speed, speedily, quickly, apace, on the run, rapidly, swiftly, at full speed or gallop, post-haste, hell for leather, like a bat out of hell, like a shot, like (greased) lightning, like the wind Someone shouted 'Fire!' and we headed flat out for the exits b flatly, unhesitatingly, directly, at once, immediately, forthwith, without delay; plainly, openly, baldly, brazenly, brashly He asked to borrow some money and she told him 'No', flat out
n. 18 room(s), flat, suite (of rooms), chambers, tenement; garden flat, maisonette, penthouse, studio, Brit bedsitter, bedsit; accommodation, living quarters, Colloq Brit digs , US and Canadian apartment, furnished room, walk-up, duplex, triplex, garden apartment We rented a two-bedroom flat in a good neighbourhood