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
  1. adjective
    involving two dimensions
    synonyms: planar
    lying in the same plane
    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
    flat; like a table in form
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    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
    shaped like a brick
    cube-shaped, cubelike, cubical, cubiform, cuboid, cuboidal
    shaped like a cube
    of a crystal system characterized by three equal axes at right angles
    having three dimensions
    lying on the same line
    arranged in a line
    resembling a line
    rectilineal, rectilinear
    characterized by a straight line or lines
    show more antonyms...
  2. adjective
    lacking the expected range or depth; not designed to give an illusion or depth
    “a film with two-dimensional characters”
    synonyms: 2-dimensional, flat
    having or involving or marked by several dimensions or aspects
Word Family

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