A type of racetrack, where the circuit is not banked to allow for track in cornering, thus missing positive camber needed to transform centrifugal force into normal force and traction. The shape footprint of the oval itself is unrelated to being "flat", as it only deals with the banking of the track and not the shape traced out by the track.

(graphical user interface) A user interface style that that is characterized by the lack of shadows, giving a flat, two-dimensional look

A party to celebrate moving into a new flat (apartment).

plural of flat-warming

(rail transport) A flat spot on a railway wheel caused when a wheel, or both wheels on the same axle, in a moving train stop rotating.

Having a (generally) level upper surface.

Of or relating to the theory that planet Earth is flat.

plural of flat dog

The belief in, or advocacy for, the theory that the planet Earth is flat.

A small patch of a vehicle tyre that has been flattened by abrasion with the road surface, so that the tyre is no longer smoothly circular at that point; usually caused by the wheel locking under heavy braking.