Rum is a liquor made by fermenting then distilling sugarcane molasses or sugarcane juice. The distillate, a clear liquid, is usually aged in oak barrels.
Rums are produced in various grades. Light rums are commonly used in cocktails, whereas "golden" and "dark" rums were typically consumed straight or neat, iced ("on the rocks"), or used for cooking, but are now commonly consumed with mixers. Premium rums are made to be consumed either straight or iced.