cube  n.
  1. Mathematics. A regular solid having six congruent square faces.
    1. Something having the general shape of a cube: a cube of sugar.
    2. A cubicle, used for work or study.
  2. Mathematics. The third power of a number or quantity.
  3. cubes Slang. Cubic inches. Used especially of an internal combustion engine.
[Latin cubus, from Greek kubos. N., sense 2b, short for cubicle.]