"Sugar wine" was not called rum until after 1688, and the word seems to have been an abbreviation of "rumbullion" or "rumbustion." The word may have been a term from the new pidgin English of Barbados and possibly derived from the distortion of a term in the Spanish dialect of Seville, combining Low Latin rheu, "stem," and bullion or bouillon, "boiling" (Similarly, "rhubarb" is a plant with edible stems originating from somewhere foreign--in other words, it is a "barbarous stem.").

This definition is in context to Etymology. See more contextual defintions for Rum.