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Flat or flats may refer to:


Architecture

*
Apartment An apartment (American English, Canadian English), flat (British English, Indian English, South African English), tenement (Scots English), or unit (Australian English) is a self-contained housing unit (a type of residential real estate) that ...
, known as a flat in the United Kingdom, Ireland, and other Commonwealth countries


Arts and entertainment

*
Flat (music) In music, flat means lower in pitch. It may either be used in a general sense to mean any lowering of pitch, or to specifically refer to lowering pitch by a semitone. A flat is the opposite of a sharp () which indicates a raised pitch in the sa ...
, a symbol () which denotes a lower pitch * Flat (soldier), a two-dimensional toy soldier made of tin or plastic * Flat (theatre), a flat piece of theatrical scenery * Flat, a leading type of wordplay, as identified by the National Puzzlers' League * '' Flat!'' (2010), an Indian film * Flats (band), an English band * Flats (comics), the first stage in the comic coloring process


Footwear

* Flats, footwear which is not high-heeled * Ballet flats, derived from ballet shoes, for casual wear as well as dancing * Ballet shoes (also known as ballet slippers), often referred to as "flats" or "flat shoes" * Racing flats, lightweight shoes used primarily for running a race


Geography


Landforms

*
Flat (landform) A flat is a relatively level surface of land within a region of greater relief, such as hills or mountains, usually used in the plural. The term is often used to name places with such features, for example, Yucca Flat or Henninger Flats. ''Flat' ...
, a relatively level area within a region of greater relief *
Mudflat Mudflats or mud flats, also known as tidal flats or, in Ireland, slob or slobs, are coastal wetlands that form in intertidal areas where sediments have been deposited by tides or rivers. A global analysis published in 2019 suggested that tidal ...
, intertidal wetland with a substrate of fine sediments


Bodies of water

* Flat, a shallow water area in the context of
boating Boating is the leisurely activity of travelling by boat, or the recreational use of a boat whether powerboats, sailboats, or man-powered vessels (such as rowing and paddle boats), focused on the travel itself, as well as sports activities, suc ...
,
fishing Fishing is the activity of trying to catch fish. Fish are often caught as wildlife from the natural environment (Freshwater ecosystem, freshwater or Marine ecosystem, marine), but may also be caught from Fish stocking, stocked Body of water, ...
or
marine biology Marine biology is the scientific study of the biology of marine life, organisms that inhabit the sea. Given that in biology many scientific classification, phyla, family (biology), families and genera have some species that live in the sea and ...
, often used in plural form **
Brewster Flats Cape Cod Bay is a large bay of the Atlantic Ocean adjacent to the U.S. state of Massachusetts. Measuring below a line drawn from Ocean Bluff-Brant Rock, Massachusetts, Brant Rock in Marshfield to Race Point Lighthouse, Race Point in Provinceto ...
, an area of Cape Cod Bay off the shore of Massachusetts, U.S. ** Kentish Flats Offshore Wind Farm, off the coast of Kent, England ** Rhyl Flats, a wind farm off the coast of North Wales * Flat coast, a shoreline where the land descends gradually into the sea


Places


United States

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Flat, Alaska Flat is a census-designated place (CDP) in Yukon-Koyukuk Census Area, Alaska, United States. As of the 2010 Census, the population of the CDP was 0, down from 4 residents in 2000. Its post office closed in January 2004. Few buildings are inhab ...
, a census-designated place *
Flat, Kentucky Flat is an unincorporated community in Wolfe County, Kentucky Kentucky (, ), officially the Commonwealth of Kentucky, is a landlocked U.S. state, state in the Southeastern United States, Southeastern region of the United States. It bor ...
, an unincorporated community *
Flat, Missouri Flat is an unincorporated community in southern Phelps County, Missouri, United States. It is located approximately sixteen miles southwest of Rolla. The community is at the intersection of Missouri routes M and T. Edgar Springs lies about fou ...
, an unincorporated community *
Flat, Texas Flat is a small unincorporated community in Coryell County, Texas, United States. It is part of the Killeen–Temple–Fort Hood metropolitan statistical area. History The area was originally titled "Mesquite Flat" when the town a ...
, an unincorporated community *
Flat Brook Flat Brook, also spelled as Flatbrook, is an U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map, accessed April 1, 2011 tributary of the Delaware River in Sussex County, New Jersey in the United S ...
, a tributary of the Delaware River in Sussex County, New Jersey *
Flats, Nebraska Flats is an extinct town in McPherson County, Nebraska, United States. The GNIS The Geographic Names Information System (GNIS) is a database of name and location information about more than two million physical and cultural features, encom ...
, United States *
Flats, West Virginia Flats is an unincorporated community in Hardy County, West Virginia West Virginia is a mountainous U.S. state, state in the Southern United States, Southern and Mid-Atlantic (United States), Mid-Atlantic regions of the United States.The Uni ...
, an unincorporated community *
Forest Lake Area Trail System The ultimate goal of the Forest Lake Area Trail System (FLATS) is to develop a trail system connecting Kirksville and Thousand Hills State Park. The first phase of the trail is a ten-foot wide concrete trail between the Petroglyph Site and Marina ...
, Missouri


Other

*
Flat, Puy-de-Dôme Flat () is a former commune in the Puy-de-Dôme department in Auvergne in central France. On 1 January 2016, it was merged into the new commune of Aulhat-Flat.Flat Island (disambiguation) Flat Island may refer to: * Flat Island (Antarctica), in Robertson Bay * Flat Island (Hong Kong) * Flat Island (Spratly) in the South China Sea * Flat Island (Falkland Islands) in the south Atlantic Ocean * Flat Island Wildlife Sanctuary, in ...
, in various places *
Flat Islands (disambiguation) Flat Islands may refer to: * Flat Islands (Antarctica) * Flat Islands, Bonavista Bay, Newfoundland and Labrador * Flat Islands, Placentia Bay, Newfoundland and Labrador See also * Flat Island (disambiguation) * Flat Isles The Northumberland I ...
, in Canada and Antarctica *
Flat River (disambiguation) Flat River may refer to: Rivers * Flat River (Northwest Territories), a tributary of the South Nahanni River * Flat River (Louisiana) * Flat River (Missouri), a tributary of the Big River * Flat River (Michigan) The Flat River (Ottawa diale ...
, in the United States and Canada


Mathematics and geometry

*
Flat (geometry) In geometry, a flat is an affine subspace, i.e. a subset of an affine space that is itself an affine space. Particularly, in the case the parent space is Euclidean, a flat is a Euclidean subspace which inherits the notion of distance from it ...
, 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 *
Flat module In algebra, flat modules include free modules, projective modules, and, over a principal ideal domain, torsion-free modules. Formally, a module (mathematics), module ''M'' over a ring (mathematics), ring ''R'' is ''flat'' if taking the tensor prod ...
in ring theory *
Flat morphism In mathematics, in particular in algebraic geometry, a flat morphism ''f'' from a scheme (mathematics), scheme ''X'' to a scheme ''Y'' is a morphism such that the induced map on every Stalk (sheaf), stalk is a flat map of rings, i.e., :f_P\colon \ ...
in algebraic geometry *
Flat space In mathematics, curvature is any of several strongly related concepts in geometry that intuitively measure the amount by which a curve deviates from being a straight line or by which a surface deviates from being a plane. If a curve or sur ...
, a space with zero curvature * Flat sign, for its use in mathematics; see
musical isomorphism In mathematics—more specifically, in differential geometry—the musical isomorphism (or canonical isomorphism) is an isomorphism between the tangent bundle \mathrmM and the cotangent bundle \mathrm^* M of a Riemannian or pseudo-Riemannian ...
, mapping vectors to covectors


People


Nickname

* Earl "Flat" Chase (1910–1954), Canadian baseball player * Flat Walsh (1897–1959), Canadian ice hockey goaltender


Fictional characters

* Flat Eric, a character in some Levi's commercials * '' Flat Stanley'', namesake of an American children's book series


Groups

* FLATS or First Lady Astronaut Trainees, American women who underwent NASA Project Mercury physiological screening tests


Other uses

* Flat (gridiron football), the area of the gridiron football field * Flat butterflies or flats, certain skipper butterfly genera in subfamily
Pyrginae Pyrginae, commonly known as spread-winged skippers, are a subfamily of the skipper butterfly family (biology), family (Hesperiidae). The subfamily was established by Hermann Burmeister in 1878. Their delimitation and internal systematics has chan ...
: ** ''
Calleagris ''Calleagris'' is a genus of skipper (butterfly), skippers in the family Hesperiidae. Species *''Calleagris hollandi'' (Butler, 1897) *''Calleagris jamesoni'' (Sharpe, 1890) *''Calleagris kobela'' (Trimen, 1864) *''Calleagris krooni'' Vári, 197 ...
'' (scarce flats), ** '' Celaenorrhinus'' of tribe Celaenorrhinini; ** '' Eagris'', and ** '' Tagiades'' (water flats, snow flats), of tribe Tagiadini * Flat (USPS), an oversized letter *
Optical flat An optical flat is an Optics, optical-grade piece of glass lapping, lapped and polishing, polished to be extremely flat on one or both sides, usually within a few tens of nanometres (billionths of a metre). They are used with a monochromatic li ...
, an extremely flat piece of glass


See also

* * *
The Flat (disambiguation) The Flat or The Flats may refer to any of the following: Geography *The Flat (Houtman Abrolhos), a reef in Australia's Houtman Abrolhos island group *"The Flat", a nickname for South Dunedin, New Zealand *The Flat, Gloucestershire, in southwest Eng ...
, including "The Flats" * Flat Earth (disambiguation) * Flatbed (disambiguation) *
Flatten (disambiguation) Flatten may refer to: * Amy Flatten, American expert on international scientific collaboration and abstract oil painter * Flat-ten engine, an engine with two banks of five opposing cylinders each * Svein Flåtten, Norwegian politician * Mount Flat ...
*
Flattening Flattening is a measure of the compression of a circle or sphere along a diameter to form an ellipse or an ellipsoid of revolution (spheroid) respectively. Other terms used are ellipticity, or oblateness. The usual notation for flattening is f ...
*
Flatness (disambiguation) Flatness may refer to: * Flatness (art) * Flatness (cosmology) * Flatness (liquids) * Flatness (manufacturing), a geometrical tolerance required in certain manufacturing situations * Flatness (systems theory), a property of nonlinear dynamic s ...
{{disambiguation, geo