# three-dimensional

Things that have depth and can be rotated in space are three-dimensional. Everything around you that you can touch or move around—your sneaker, your dog, the rug on the floor—is three-dimensional.

Dimensionality can be a tricky quality to understand, but it helps to think of a line connecting two points as one-dimensional and a flat plane or shape, like a triangle drawn on paper, as two-dimensional. When you add depth to a shape, you get a three-dimensional object: a triangle becomes a pyramid, for example. When a story or other work of art is so well-made and detailed that it's believable, you can also describe it as three-dimensional.

Definitions of three-dimensional
involving or relating to three dimensions or aspects; giving the illusion of depth
“lifelike three-dimensional characters”
“a three-dimensional account of conditions under the new government”
synonyms:
multidimensional
having or involving or marked by several dimensions or aspects
having three dimensions
synonyms: cubic
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
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Antonyms:
linear, one-dimensional
of or in or along or relating to a line; involving a single dimension
planar, two-dimensional
involving two 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
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