• Flatness
• Flat (music), a symbol which denotes a lower pitch ()
• Flat, an apartment within a residential building
• Flat (geometry), the generalization of lines and planes in an n-dimensional Euclidean space
• a flat, two-dimensional toy soldier made of tin or plastic
• Flats (theatre), flat pieces of theatrical scenery
• Flats (USPS), an oversized letter
• Racing flats, lightweight shoes used primarily for running a race
• Flats, women's shoes with almost no heel at all
• A flat tire
• Flat, an anagram or puzzle in verse, the primary form of wordplay before crosswords came along
• Flatcar, an open container on wheels designed to carry heavy loads

Places

• Flat, Alaska, United States
• Flat, Missouri, United States
• Flat, Puy-de-Dôme, a commune in région Auvergne, France
• Flat, Texas, United States
• The Flats, Cleveland, Ohio, United States
• Flat Island, Hong Kong, People's Republic of China
• Flat Brook, tributary of the Delaware River in Sussex County, New Jersey
• Flat River (North Carolina), river in Southern Person County, North Carolina
• Flats, West Virginia, an unincorporated community in Hardy County, West Virginia, USA

See also

• Mudflat
• Planar