E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Dwarfs of Northern mythology, living in hills or mounds; they are represented as stumpy, misshapen, and humpbacked, inclined to thieving, and fond of carrying off children or substituting one of their own offspring for that of a human mother. They are called hill-people, and are especially averse to noise, from a recollection of the time when Thor used to be for ever flinging his hammer after them. (Icelandic, troll.) (See FAIRY.)