- 1having a level surface, not curved or sloping low buildings with flat roofs People used to think the earth was flat. Exercise is the only way to get a flat stomach after having a baby. The sails hung limply in the flat calm (= conditions at sea when there is no wind and the water is completely level).
- 2(of land) without any slopes or hills The road stretched ahead across the flat landscape. The desert was flat, mile after mile. He reached a flatter section of land near the river.
- 3(of surfaces) smooth and even; without lumps or holes I need a flat surface to write on. We found a large flat rock to sit on. not high
- 4broad but not very high Tortillas are a kind of flat Mexican bread. flat shoes (= with no heels or very low ones) dull
- 5 dull; lacking interest or enthusiasm He felt very flat after his friends went home. It was a curiously flat note on which to end the election campaign. voice
- 6 not showing much emotion; not changing much in tone Her voice was flat and expressionless. He spoke in a flat Midwestern accent. colors/pictures
- 7very smooth, with no contrast between light and dark, and giving no impression of depth Acrylic paints can be used to create large, flat blocks of color. business
- 8not very successful because very little is being sold The housing market has been flat for months. refusal/denial
- 9[only before noun] not allowing discussion or argument; definite Her request was met with a flat refusal. He gave a flat “No!” to one reporter's question. These results are in flat contradiction to the theory of relativity. in music
- 10 used after the name of a note to mean a note a half step lower That note should be B flat, not B. opposite sharp compare natural
- 11below the correct pitch (= how high or low a note sounds) The high notes were slightly flat. opposite sharp drink
- 12 no longer having bubbles in it; not fresh The soda was warm and had gotten flat. tire
- 13not containing enough air, usually because of a hole feet
- 14with no natural raised curves underneath see also flat-footed
- noun [uncountable]Idioms
adjectivejump to other results
flatnessjump to other results
completely flat The country around here is as flat as a pancake.
as flat as a pancakejump to other results
in bed because you are sick She's been flat on her back for over a week now. (figurative) The bonds market was flat on its back (= business was very bad).
(flat) on your back (informal)jump to other results