flat Definition in the Cambridge English Dictionary
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Definition of “flat” - English Dictionary

Definition of "flat" - American English Dictionary

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flatadjective

 us   /flæt/

flat adjective (LEVEL)

[-er/-est only] (-tt-) level and ​smooth; having little or no ​height and not ​raised or round: A ​deskprovides a flat ​surface to ​work on. Campers ​look for flat ​ground to put up ​theirtents. [-er/-est only] (-tt-) A ​drink that is flat has ​stoppedbubbling: If you don’t put the ​top back on the ​sodabottle, it will go flat. [-er/-est only] (-tt-) If a ​tire is flat, the ​air has gone out of it so that it does not give the ​support it should: One of my ​tires is flat and I’ll have to ​change it.

flat adjective (COMPLETE)

[not gradable] complete and ​certain: His ​request for ​time off from ​work was ​met with a flat ​refusal.

flat adjective (NOT CHANGING)

[not gradable] (esp. of an ​amount of ​money) not ​changing or ​varying: We ​charge a flat ​rate of $25 ​perhour. Sales are flat (= ​low and not ​changing) during this ​time of ​year.

flatadjective, adverb [-er/-est only]

 us   /flæt/ (-tt-)

flat adjective, adverb [-er/-est only] (MUSIC)

music lower in pitch than a ​particular or the ​correctnote

flatnoun [C]

 us   /flæt/

flat noun [C] (APARTMENT)

esp. Br an apartment : They have a ​house in the ​country and a flat in London.

flat noun [C] (SOMETHING LEVEL)

something flat, esp. a ​tire that has ​lostitsair, so that it does not give the ​support that it should: We ​pulled off to the ​side of the ​road to ​change a flat. The flat of the ​hand is the inside, ​levelpart of the ​hand with the ​fingersstraight: He ​swatted the ​table with the flat of his ​hand.

flat noun [C] (MUSIC)

music a ​mark in written ​musicshowing that a ​note should be ​played a half steplower

flatadverb

 us   /flæt/

flat adverb (LEVEL)

[-er/-est only] (-tt-) in a ​levelposition, often against another ​surface: He ​hurt his back and could only ​sleeplying flat on his back.

flat adverb (COMPLETELY)

[not gradable] completely, or to the ​greatestdegreepossible: When he ​asked for a ​raise, the ​bossturned him down flat. I’m flat ​broke (= I have no ​money).

flat adverb (EXACTLY)

[only after n, not gradable] exactly: We ​managed to get to the ​station in five ​minutes flat.
Idioms
(Definition of flat from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definition of "flat" - British English Dictionary

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flatadjective

uk   us   /flæt/ (flatter, flattest)

flat adjective (LEVEL)

B1 level and ​smooth, with no ​curved, high, or ​hollowparts: An ​icerinkneeds to be ​completely flat. Roll out the ​pastry on a flat ​surface. Much of the ​countryside in that ​region is very flat.
More examples

flat adjective (NOT HIGH)

B1 level but having little or no ​height: flat ​shoes (= ​ones without a ​raisedheel) Flat ​bread is made without yeast, and ​therefore does not ​rise: Pitta and ​nan are two ​types of flat ​bread.flat cap/hat UK a ​hat that is not ​rounded on ​top and has little ​height

flat adjective (NOT ACTIVE)

not ​interesting, or without ​emotion or ​excitement: After the ​excitement of the ​party, ​lifeseemssomewhat flat now. I ​thought her ​performance a little flat. I ​think the ​colours in this ​painting are ​kind of flat (= not ​varied or ​bright).

flat adjective (BATTERY)

UK (US dead) with no ​electricalpowerleft in it: I ​left my ​carlights on and now the ​battery is flat.

flat adjective (DRINK)

C2 If a ​drink is flat, it has ​stopped being fizzy (= with ​bubbles): If you don't put the ​top back on that ​bottle of ​beer, it will go flat.

flat adjective (COMPLETE)

[before noun] complete or ​certain, and not ​likely to ​change: His ​request for ​time off ​work was ​met with a flat refusal. The ​official has ​issued a flat denial of the ​accusations against her.

flat adjective (WITHOUT AIR)

B2 If something such as a ​tyre or ​ball is flat, it does not ​contain enough ​air: I got a flat tyre (= the ​air went out of it) after ​driving over a ​nail.

flat adjective (FIXED)

[before noun] (​especially of an ​amount of ​money) ​fixed and not ​likely to ​change: We ​charge a flat fee/​rate of $25 ​perhour.
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flat adjective (PROFITS)

If ​profits, ​sales, etc. are flat, they are not ​growing or ​increasing: Demand for ​ourmachineryabroad is ​increasing, while ​growth is flat at ​home.

flatnoun

uk   us   /flæt/

flat noun (HOME)

A1 [C] UK (US apartment) a set of ​rooms for ​living in that are ​part of a ​largerbuilding and are usually all on one ​floor: a ​furnished/​unfurnished flat a block of flats They have a ​house in the ​country and a flat in Manchester.
See also
More examples

flat noun (LEVEL GROUND)

[C often plural] an ​area of ​low, ​levelground, often near ​water: The salt flats are used for ​motorracing. The mud flats ​attractlargenumbers of ​birds.the flat of your hand the palm and ​fingers when they are ​heldstraight and ​level: He ​hit me with the flat of his ​hand.be on the flat UK to be on a ​levelsurface, not on a ​slope or ​hill: Most of the ​path is on the flat.

flat noun (TYRE)

[C usually singular] mainly US informal a ​tyre that does not have any or enough ​air in it : We were late because we had to ​stop and ​fix a flat.

flat noun (SHOES)

flats [plural] women's ​shoes without high heels: I ​feel more ​comfortable in flats.

flat noun (MUSIC)

[C] (a ​symbol for) a ​note that is a semitonelower than a ​statednote

flatadjective, adverb

uk   us   /flæt/ (flatter, flattest)

flat adjective, adverb (MUSIC)

(in ​music) ​lower than a ​particularnote or the ​correctnote: The ​topstring on ​yourviolin is flat. She ​sang flat ​throughout the ​song (= all the ​notes she ​sang were too ​low).

flatadverb

uk   us   /flæt/ (flatter, flattest)

flat adverb (LEVEL)

B2 in a ​levelposition, often against another ​surface: Lay the ​cloth flat ​across the ​table.
More examples

flat adverb (NOT HIGH)

into a flat ​shape without ​height: These ​patiochairs will ​fold flat for ​storage.

flat adverb (COMPLETELY)

UK informal (US flat out) completely or to the ​greatestdegreepossible: She told him flat that she would not go to the show. Could you ​lend me some ​money, I'm flat broke (= I have no ​money).
See also
three minutes, half an hour, etc. flat informal exactly three ​minutes, ​half an ​hour, etc.: We ​managed to get to the ​station in five ​minutes flat.flat out informal as ​fast or as hard as ​possible: My ​car only does about 60 ​mph, ​even when it's going flat out. We've been ​working flat out to get this done.
(Definition of flat from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)

Definition of "flat" - Business English Dictionary

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flatadjective

uk   us   /flæt/ (flatter, flattest)
COMMERCE, FINANCE if ​profits, ​sales, etc. are flat, they are not ​growing or ​increasing: Demand for our ​machinery abroad is ​increasing, while ​growth is flat at ​home.
STOCK MARKET if the ​stockmarket is flat, the ​prices of ​shares are not ​rising or ​falling: The ​market remained at 9,000 ​points after a flat day of ​trading yesterday.
fixed and without any ​additionalcosts: He ​submitted a flat ​price for completing the ​work, ​including all ​labour and ​materials.
HR used to describe the ​structure of an ​organization in which there are not many different ​levels of ​employees between the ​top and the ​bottom: Companies with a flat ​organizationalstructure can usually make decisions more quickly.
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flatnoun [C]

uk   us   /flæt/
UK PROPERTY a set of ​rooms for ​living in which are ​part of a larger ​building and which are usually all on one ​floor: a furnished/unfurnished flat a block of flats He ​works as a ​propertydeveloper, ​buying, ​renovating and ​selling on flats in the ​capital.
Compare

flatadverb

uk   us   /flæt/
fall flat to be unsuccessful: The ​dealfell flat when the two ​sides could not ​agree on the ​terms of the ​contract.
flat out informal as hard or as fast as possible: Towards the end of the ​project the whole ​department was ​working flat out to ​meet the ​deadlines.
(Definition of flat from the Cambridge Business English Dictionary © Cambridge University Press)
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“flat” in Business English

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