Real Dictionary

cube
countable noun: A cube is a solid object with six square surfaces which are all the same size.

cube in American English 1
a solid with six equal, square sides
noun: a solid bounded by six equal squares, the angle between any two adjacent faces being a right angle

cube in American English 2
any tropical American plant of a genus (Lonchocarpus) of the pea family, whose roots yield rotenone
noun: any of several tropical plants of the legume family that are used in making fish poisons and insecticides

cube in British English 1
noun: a solid having six plane square faces in which the angle between two adjacent sides is a right angle
verb: to raise (a number or quantity) to the third power

cube in British English 2
noun: any of various tropical American plants, esp any of the leguminous genus Lonchocarpus, the roots of which yield rotenone