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), 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 relatively level area within a region of greater relief * Mudflat, intertidal wetland with a substrate of fine sediments

Bodies of water

* Flat, a shallow water area in the context of boating, fishing or marine biology, often used in plural form ** Brewster Flats, 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

* Flat, Alaska, a census-designated place * Flat, Kentucky, an unincorporated community * Flat, Missouri, an unincorporated community * Flat, Texas, an unincorporated community * Flat Brook, a tributary of the Delaware River in Sussex County, New Jersey * Flats, Nebraska, United States * Flats, West Virginia, an unincorporated community * Forest Lake Area Trail System, Missouri

Other

* Flat, Puy-de-Dôme, a commune in the French region of Auvergne * Flat Island (disambiguation), in various places * Flat Islands (disambiguation), in Canada and Antarctica * Flat River (disambiguation), in the United States and Canada

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 * Flat module in ring theory * Flat morphism in algebraic geometry * Flat space, 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: ** '' Calleagris'' (scarce flats), ** '' Celaenorrhinus'' of tribe Celaenorrhinini; ** '' Eagris'', and ** '' Tagiades'' (water flats, snow flats), of tribe Tagiadini * Flat (USPS), an oversized letter * Optical flat, an extremely flat piece of glass