# two-dimensional

Two-dimensional things are flat — they can be measured in length and width, but they have no depth. Geometrical shapes like squares, circles, and polygons are all two-dimensional.

A sheet of paper may seem to be two-dimensional, but because it does have a measurable (if tiny) depth, it's actually three-dimensional. Your dog is also three-dimensional, but a picture of him on your computer screen is two-dimensional. You can also use this mathematical adjective to mean "superficial," or "shallow." A bad guy in a movie might be described as a two-dimensional character, for example, since he seems to have "no depth."

Definitions of two-dimensional
involving two dimensions
synonyms: planar
coplanar
lying in the same plane
flat
having a relatively broad surface in relation to depth or thickness
placoid, platelike
as the hard flattened scales of e.g. sharks
flattened, planate
having been flattened
tabular
flat; like a table in form
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Antonyms:
cubic, three-dimensional
having three dimensions
linear, one-dimensional
of or in or along or relating to a line; involving a single dimension
blockish, blocky
resembling a block in shape
box-shaped, boxlike, boxy
resembling a box in rectangularity
brick-shaped
shaped like a brick
cube-shaped, cubelike, cubical, cubiform, cuboid, cuboidal
shaped like a cube
isometric
of a crystal system characterized by three equal axes at right angles
solid
having three dimensions
collinear
lying on the same line
lineal
arranged in a line
linelike
resembling a line
rectilineal, rectilinear
characterized by a straight line or lines