Flat
Flat or flats may refer to:

Architecture
Apartment, 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

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
Flatness (mathematics), of a surface
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, 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
Flats (USPS), an oversized letter
Optical flat, an extremely flat piece of glass

See also
All pages with titles beginning with Flat 
All pages with titles containing Flat
The Flat (disambiguation), including "The Flats"
Flatten (disambiguation)
Flattening
Flatness (disambiguation)