# Flat

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> Source: https://en.wikipedia.org/wiki/Flat
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**Flat** or **flats** may refer to:

## Architecture

- [Apartment](/source/Apartment), known as a flat in the United Kingdom, Ireland, and other Commonwealth countries

## Arts and entertainment

- [Flat (music)](/source/Flat_(music)), a symbol () which denotes a lower pitch
- [Flat (soldier)](/source/Flat_(soldier)), a two-dimensional toy soldier made of tin or plastic
- [Flat (theatre)](/source/Flat_(theatre)), a flat piece of theatrical scenery
- Flat, a leading type of wordplay, as identified by the [National Puzzlers' League](/source/National_Puzzlers'_League)
- *[Flat!](/source/Flat!)* (2010), an Indian film
- [Flats (band)](/source/Flats_(band)), an English sludge metal and punk band
- [Flats (comics)](/source/Flats_(comics)), the first stage in the comic coloring process

## Footwear

- Flats, footwear which is not [high-heeled](/source/High-heeled_footwear)
- [Ballet flats](/source/Ballet_flat), derived from ballet shoes, for casual wear as well as dancing
- [Ballet shoes](/source/Ballet_shoe) (also known as ballet slippers), often referred to as "flats" or "flat shoes"
- [Racing flats](/source/Racing_flat), lightweight shoes used primarily for running a race

## Geography

### Landforms

- [Flat (landform)](/source/Flat_(landform)), a relatively level area within a region of greater relief
- [Mudflat](/source/Mudflat), intertidal wetland with a substrate of fine sediments

### Bodies of water

- Flat, a shallow water area in the context of [boating](/source/Boating), [fishing](/source/Fishing) or [marine biology](/source/Marine_biology), often used in plural form - [Brewster Flats](/source/Brewster_Flats), an area of Cape Cod Bay off the shore of Massachusetts, U.S. - [Kentish Flats Offshore Wind Farm](/source/Kentish_Flats_Offshore_Wind_Farm), off the coast of Kent, England - [Rhyl Flats](/source/Rhyl_Flats), a wind farm off the coast of North Wales
- [Flat coast](/source/Flat_coast), a shoreline where the land descends gradually into the sea

### Places

#### United States

- [Flat, Alaska](/source/Flat,_Alaska), a census-designated place
- [Flat, Kentucky](/source/Flat,_Kentucky), an unincorporated community
- [Flat, Missouri](/source/Flat,_Missouri), an unincorporated community
- [Flat, Texas](/source/Flat,_Texas), an unincorporated community
- [Flat Brook](/source/Flat_Brook), a tributary of the Delaware River in Sussex County, New Jersey
- [Flats, Nebraska](/source/Flats,_Nebraska), United States
- [Flats, West Virginia](/source/Flats,_West_Virginia), an unincorporated community
- [Forest Lake Area Trail System](/source/Forest_Lake_Area_Trail_System), Missouri

#### Other

- [Flat, Puy-de-Dôme](/source/Flat,_Puy-de-D%C3%B4me), a commune in the French region of Auvergne
- [Flat Island (disambiguation)](/source/Flat_Island_(disambiguation)), in various places
- [Flat Islands (disambiguation)](/source/Flat_Islands_(disambiguation)), in Canada and Antarctica
- [Flat River (disambiguation)](/source/Flat_River_(disambiguation)), in the United States and Canada

## Mathematics

- [Flat function](/source/Flat_function), a real function where all derivatives at a point are 0
- [Flat (geometry)](/source/Flat_(geometry)), the generalization of lines and planes in an *n*-dimensional Euclidean space
- [Flat (matroids)](/source/Flat_(matroids)), a further generalization of flats from linear algebra to the context of matroids
- [Flat module](/source/Flat_module) in ring theory
- [Flat morphism](/source/Flat_morphism) in algebraic geometry
- [Flat space](/source/Flat_space), a space with zero curvature
- [Flat surface (geometry)](/source/Flat_surface_(geometry)), a surface with zero curvature
- Flat sign, for its use in mathematics; see [musical isomorphism](/source/Musical_isomorphism), mapping vectors to covectors

## People

### Nickname

- [Earl "Flat" Chase](/source/Earl_%22Flat%22_Chase) (1910–1954), Canadian baseball player
- [Flat Walsh](/source/Flat_Walsh) (1897–1959), Canadian ice hockey goaltender

### Fictional characters

- [Flat Eric](/source/Flat_Eric), a character in some Levi's commercials
- *[Flat Stanley](/source/Flat_Stanley)*, namesake of an American children's book series

### Groups

- FLATS or [First Lady Astronaut Trainees](/source/First_Lady_Astronaut_Trainees), American women who underwent NASA Project Mercury physiological screening tests

## Other uses

- [Flat (gridiron football)](/source/Flat_(gridiron_football)), the area of the gridiron football field
- Flat butterflies or flats, certain skipper butterfly genera in subfamily [Pyrginae](/source/Pyrginae): - *[Calleagris](/source/Calleagris)* (scarce flats), - *[Celaenorrhinus](/source/Celaenorrhinus)* of tribe Celaenorrhinini; - *[Eagris](/source/Eagris)*, and - *[Tagiades](/source/Tagiades)* (water flats, snow flats), of tribe Tagiadini
- [Flat (USPS)](/source/Flat_(USPS)), an oversized letter
- [Flat (watercraft)](/source/Flat_(watercraft)), a type of barge, especially on the River Mersey
- [Optical flat](/source/Optical_flat), an extremely flat piece of glass

## See also

- [The Flat (disambiguation)](/source/The_Flat_(disambiguation)), including "The Flats"
- [Flat Earth (disambiguation)](/source/Flat_Earth_(disambiguation))
- [Flatbed (disambiguation)](/source/Flatbed_(disambiguation))
- [Flatten (disambiguation)](/source/Flatten_(disambiguation))
- [Flattening](/source/Flattening)
- [Flatness (disambiguation)](/source/Flatness_(disambiguation))

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Adapted from the Wikipedia article [Flat](https://en.wikipedia.org/wiki/Flat) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Flat?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.