DictionaryflatLevel surface
adjective / adverb / noun

flat

FLAT/flˈæt/

Level across a surface without raised parts.

The tabletop is perfectly flat, with no bumps or ridges.

A perfectly flat tabletop shown in clear side perspective beside a straightedge.
Etymology

Old Norse flatr already meant flat. Early English uses described something stretched out or lying full-length on the ground, followed by the surface sense of being level, smooth, and without curvature or projection.

In context

Joanne Kanigowski0:23
Make sure your back is straight and your neck is long. Your feet are flat on the floor.
Piano Lesson 23 - The Dotted Crotchet

More examples

  • Lay the fabric flat before you cut it.
  • Shallow water covers the tidal flats at high tide.
  • She wears flats instead of heels for the walk.

Forms

flat · flatter · flattest · flats

flatten verb — To make or become more level.

flatness noun — The quality of having an even surface.

Similar words

level
Emphasizes being horizontal; a flat surface can be tilted.
even
Emphasizes uniform height or texture, without bumps or dips.
smooth
Emphasizes freedom from roughness; a smooth surface can curve.