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|Look up flat in Wiktionary, the free dictionary.|
Flat, or flatness, describes an object or condition that is very smooth or level.
In Great Britain, Ireland and Australia, a "flat" means an apartment.
Flat or flats may also refer to:
- Flat, Alaska, United States
- Flat, Kentucky
- Flat, Missouri, United States
- Flat, Puy-de-Dôme, a commune in région Auvergne, France
- Flat, Texas, United States
- Flat Brook, tributary of the Delaware River in Sussex County, New Jersey
- Flat Island, Hong Kong, People's Republic of China
- Flat River (North Carolina), a river in Southern Person County, North Carolina
- Flats, West Virginia, an unincorporated community in Hardy County, West Virginia, USA
- Flat or flats, a level surface of land, usually used in plural, such as mud flat or tidal flats. Also place names for these places, like Yucca Flat or Henninger Flats.
- Flat (music), a symbol (♭) which denotes a lower pitch
- Flats (comics), the first stage in the comic coloring process
- Flats (theatre), flat pieces of theatrical scenery
- Flats (band), English band
- Flat!, a 2010 Indian film
- Flats, footwear which is not high-heeled
- Racing flats, lightweight shoes used primarily for running a race
- Ballet slippers are often referred to as 'flats' or 'flat shoes', as opposed to the Pointe shoes more advanced female dancers wear
Mathematics and geometry 
- Flat (geometry), the generalization of lines and planes in an n-dimensional Euclidean space
- Flat (matroids), a further generalization of flats from linear algebra to the context of matroids
- For use of flat sign in mathematics, see musical isomorphism - mapping vectors to covectors
- Flat morphism in algebraic geometry
- Flat module in abstract algebra
- Flat, a deflated pneumatic tire
- Flat car, an open container on wheels designed to carry heavy loads
- Flat spot, a fault in the shape of a railroad wheel
Other uses 
- Flat (soldier), a two-dimensional toy soldier made of tin or plastic
- Flat, a leading type of wordplay predating the invention of crosswords, as identified by the National Puzzlers' League
- Flats or flat butterflies, certain skipper butterfly genera in subfamily Pyrginae:
- Flats (USPS), an oversized letter
- Optical flat, an extremely flat piece of glass
- Forest Lake Area Trail System
See also 
- All pages beginning with "Flat"
- All pages with titles containing "Flat"
- The Flat (disambiguation)
- The Flats
- Flatten (disambiguation)
- Planar (disambiguation)
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