Flat

Flat or flats may refer to:

TALYA LEVINE IS FLAT TOO!!!!

Flat bone, bone composed of two thin layers of compact tissue enclosing between them a variable quantity of cancellous tissue
Flat feet, the condition in humans in which arch of the foot collapses

Architecture

A self-contained housing unit that occupies only part of a building, referred to in America as an "apartment", while in the rest of the world as a flat.
Flat roof, type of covering of a building

Flat cap, rounded soft men's cap with a small brim in front and a somewhat stiff peak in the back
Flats, women's shoes with almost no heel at all
Racing flats, lightweight shoes used primarily for running a race

Flat Eric, low-tech, yellow puppet character from Levi's commercials for Sta-Prest One Crease Denim Clothing
Flat Stanley, title character of a 1964 children's book by Jeff Brown

Flat, space or space-time without curvature
Flat map, homomorphism f from a ring R to a ring S such that S becomes a flat R-module when the action of R on S is given by f
Flat module, R-module M such that taking the tensor product over R with M preserves exact sequences in abstract algebra
Flat morphism, morphism such that the induced map on every stalk is a flat map of rings in mathematics

Flat engine, internal combustion engine with its pistons parallel to the ground
Flat rated, constrained to a lower Horsepower rating
Flat tire, condition of a pneumatic tire which must be fixed before the car can be driven safely
Flat-4, four cylinder internal combustion engine where the cylinders are arranged in a flat configuration
Flat-6, 6 cylinder configuration of a flat engine

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Flat-twin, two cylinder internal combustion engine with the cylinders arranged in a flat configuration

Crane Flat, campground in Yosemite National Park located 17 miles northwest of Yosemite Valley
Flat, the primary form of wordplay before crosswords came along
Flat Earth, idea that the inhabited surface of Earth is flat
Flat memory model, approach to organizing memory address space in computer programming
Flat organization, organizational structure with few or no levels of intervening management between staff and managers
Flat racing, form of horse racing which is run over a predetermined distance and in which the horses are not required to jump over obstacles
Flat weighting, noise-measuring set
Flat White, coffee beverage served in Australia and New Zealand
Flats (theatre), flat pieces of theatrical scenery
Flats (USPS), type of package
Mersey Flat, two masted, doubled-ended barge with rounded bilges
Tortilla Flat, early Steinbeck novel set in Monterey, California