A die is a small throwable object with multiple resting attitudes, used for generating random numbers or other symbols. This makes dice suitable as gambling devices, especially for craps or sic bo, or for use in non-gambling tabletop games.
A traditional die is a cube (often with corners slightly rounded), with each of its six faces showing a different number. The design as a whole is aimed at each die providing one randomly determined integer, in the range from one to six, with each of those values being equally likely.
More generally, a variety of similar devices are often described as dice. Such specialized dice may have polyhedral or irregular shapes, and may have faces marked with various symbols instead of numbers. They may be used to produce random results other than one through six. There are also "loaded" or "crooked" dice, designed to favor some results over others, for purposes of deception or amusement.