In math, a cube is a number multiplied by itself three times. The cube of 2 is 8 (2 x 2 x 2). It is also a three-dimensional shape where each of the six sides is a square or something shaped like a cube, such as an ice cube or meat cut into cubes).

The noun cube goes back to the Greek word kybos, which was a six-sided die used in games. As a verb, cube means to cut into cube shapes. You can buy cookie dough that is ready for baking and formed into cubes. Place each cube on the cookie sheet, and the dough becomes a dozen round cookies — or fewer if you pop a cookie dough cube into your mouth before baking!

Definitions of cube
  1. noun
    a hexahedron with six equal squares as faces
    synonyms: regular hexahedron
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    the four-dimensional analogue of a cube
    a cubelike object
    type of:
    Platonic body, Platonic solid, ideal solid, regular convex polyhedron, regular convex solid, regular polyhedron
    any one of five solids whose faces are congruent regular polygons and whose polyhedral angles are all congruent
  2. noun
    a three-dimensional shape with six square or rectangular sides
    synonyms: block
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    a brick-shaped block that looks like gold but is not
    type of:
    a three-dimensional shape
  3. noun
    a block in the (approximate) shape of a cube
    synonyms: square block
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    dice, die
    a small cube with 1 to 6 spots on the six faces; used in gambling to generate random numbers
    ice cube
    a small cube of artificial ice; used for cooling drinks
    five, five-spot
    a playing card or a domino or a die whose upward face shows five pips
    four, four-spot
    a playing card or domino or die whose upward face shows four pips
    a domino or die whose upward face shows one pip
    six, six-spot
    a playing card or domino or die whose upward face shows six pips
    type of:
    a solid piece of something (usually having flat rectangular sides)
  4. verb
    cut into cubes
    cube the cheese”
    synonyms: dice
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    type of:
    separate with or as if with an instrument
  5. noun
    the product of three equal terms
    synonyms: third power
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    type of:
    a concept of quantity involving zero and units
  6. verb
    raise to the third power
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    type of:
    combine by multiplication
  7. noun
    any of several tropical American woody plants of the genus Lonchocarpus whose roots are used locally as a fish poison and commercially as a source of rotenone
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    type of:
    subshrub, suffrutex
    low-growing woody shrub or perennial with woody base
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