Dwarf

dwarf, Dwarf, n., dwarfs, Dwarves, dwarrows, pl. n., dwarven, dwarvish, dwarfish, adj. 1. in common usage, an individual whose adult height does not exceed 4'10" due to a genetic or medical condition, most often achondroplasia. 2. in Norse mythology, a race of diminutive, misshapen and evil cthonic beings skilled in metalcraft. 3. in the writings of J.R.R. Tolkien, a race of diminutive, misshapen and bearded cthonic beings skilled in metalcraft and stonework. 4. in fantasy literature and role-playing milieux, a race of beings patterned to various degrees after the Dwarves of Tolkien; usu. short, surly, bearded, and fond of axes. [GJ1]
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Addendum: as per Tolkien, dwarves in fantasy games are usually short, strong, and stocky. They live underground and have little contact with outsiders, except when they suddenly up and join a character party. As per Tolkien, they are traditionally enemies of the Elves. [GJ1]
Addendum #2: in correct English language usage, the proper plural form of "dwarf" is "dwarfs." (Actually, if you want to get really technical, the plural of "dwarf" is "dwarrows," but it's not common usage.) The form "Dwarves" was invented by Tolkien, who wished to give his creatures an Old Anglo-Saxon-sounding nomenclature. Being a respected Oxford linguist, he could get away with this kind of thing. [GJ1]