Synonym: apartment, dull, even, horizontal, level, lifeless, off-key, smooth, suite, unmusical. Antonym: bumpy, rough, sharp, uneven. Similar words: inflation, flag, flash, flame, flavor, flare up, flamboyant, late. Meaning: [flæt] 
n. 1. a level tract of land 2. a shallow box in which seedlings are started 3. a musical notation indicating one half step lower than the note named 4. freight car without permanent sides or roof 5. a deflated pneumatic tire 6. scenery consisting of a wooden frame covered with painted canvas; part of a stage setting 7. a suite of rooms usually on one floor of an apartment house. adj. 1. having a surface without slope, tilt in which no part is higher or lower than another 2. having a relatively broad surface in relation to depth or thickness 3. not modified or restricted by reservations 4. stretched out and lying at full length along the ground 5. lacking contrast or shading between tones 6. lowered in pitch by one chromatic semitone 7. flattened laterally along the whole length (e.g., certain leafstalks or flatfishes) 8. lacking taste or flavor or tang 9. lacking stimulating characteristics; uninteresting 10. having lost effervescence 11. (of taxes) not increasing as the amount taxed increases 12. sounded or spoken in a tone unvarying in pitch 13. horizontally level 14. lacking the expected range or depth; not designed to give an illusion or depth 15. (of a tire) completely or partially deflated 16. not reflecting light; not glossy 17. commercially inactive. adv. 1. with flat sails 2. in a forthright manner; candidly or frankly.
n. 1. a level tract of land 2. a shallow box in which seedlings are started 3. a musical notation indicating one half step lower than the note named 4. freight car without permanent sides or roof 5. a deflated pneumatic tire 6. scenery consisting of a wooden frame covered with painted canvas; part of a stage setting 7. a suite of rooms usually on one floor of an apartment house. adj. 1. having a surface without slope, tilt in which no part is higher or lower than another 2. having a relatively broad surface in relation to depth or thickness 3. not modified or restricted by reservations 4. stretched out and lying at full length along the ground 5. lacking contrast or shading between tones 6. lowered in pitch by one chromatic semitone 7. flattened laterally along the whole length (e.g., certain leafstalks or flatfishes) 8. lacking taste or flavor or tang 9. lacking stimulating characteristics; uninteresting 10. having lost effervescence 11. (of taxes) not increasing as the amount taxed increases 12. sounded or spoken in a tone unvarying in pitch 13. horizontally level 14. lacking the expected range or depth; not designed to give an illusion or depth 15. (of a tire) completely or partially deflated 16. not reflecting light; not glossy 17. commercially inactive. adv. 1. with flat sails 2. in a forthright manner; candidly or frankly. 
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181) All he did that evening was sit around the flat.
182) If you don't put the top back on that bottle of beer, it will go flat.
183) Police had to break down the door to get into the flat.
184) This flat would be an absolute slum if I wasn't here to clean it.
185) An excess of house plants in a small flat can be oppressive.
186) This discovery disproved the idea that the world was flat.
186) Sentencedict.com try its best to gather and make good sentences.
187) His house was demolished,so he was decanted a new flat.
188) I have no real proof that he was at the flat.
189) They're asking £60 000 for their flat, but the market price is nearer £55 000.
190) Unfortunately, what could have been a powerful drama fell flat.
191) He advised Evans to sell up his flat and move away to the country.
192) We're well off for storage space in the new flat.
193) That evening police forced the door of the flat and arrested Mr Roberts.
194) You should try to work at an even rate instead of taking it easy one day and working flat out the next.
195) When I first came here, I had a crummy flat.
196) I've been flat on my back with the flu all week.
197) You're sitting behind an engine that'll move you from 0 to 60mph in six seconds flat.
198) She has taken out a new ten-year lease on the flat.
199) We would dearly love to sell our flat and move to the country.
200) I stumbled sideways before landing flat on my back, much to the amusement of the rest of the lads.
201) The product will fall flat if it's footballed around too much.
202) Don't be afraid to ask your fishmonger to fillet flat fish.
203) The replumbing and rewiring of the flat ran very smoothly.
204) It would cost about ￡3,000 to install a new heating system in a flat such as theirs.
205) Her vocal range was, to say the least of it, limited, and she had a distressing tendency to sing flat.
206) His voice was low and flat, with almost no inflection.
207) Ellen is walking down the drive with a square flat box balanced on one hand.
208) He found John pacing around the flat, unable to sleep.
209) We got her a flat in the same block as ours.
210) He took the letter and smoothed it flat on the table.