[1] : The Collaborative International Dictionary of English v.0.48

elves \elves\, n.; pl. of elf.
   1913 webster elvish \elv"ish\, a.
   1. pertaining to elves; implike; mischievous; weird; also,
      vacant; absent in demeanor. see elfish.
      1913 webster

            he seemeth elvish by his countenance. --chaucer.
      1913 webster

   2. mysterious; also, foolish. obs.
      1913 webster
see also:
elf elfish 

[2] : The Collaborative International Dictionary of English v.0.48

elf \elf\, v. t.
   to entangle mischievously, as an elf might do.
   1913 webster

         elf all my hair in knots.                --shak.
   1913 webster

[3] : The Collaborative International Dictionary of English v.0.48

elf \elf\ e^lf, n.; pl. elves e^lvz. as. aelf, ylf;
   akin to mhg. alp, g. alp nightmare, incubus, icel. =alfr
   elf, sw. alf, elfva; cf. skr. .rbhu skillful, artful, rabh
   to grasp. cf. auf, oaf.
   1. an imaginary supernatural being, commonly a little sprite,
      much like a fairy; a mythological diminutive spirit,
      supposed to haunt hills and wild places, and generally
      represented as delighting in mischievous tricks.
      1913 webster

            every elf, and fairy sprite,
            hop as light as bird from brier.      --shak.
      1913 webster

   2. a very diminutive person; a dwarf.
      1913 webster

   elf arrow, a flint arrowhead; -- so called by the english
      rural folk who often find these objects of prehistoric
      make in the fields and formerly attributed them to
      fairies; -- called also elf bolt, elf dart, and elf
      shot.

   elf child, a child supposed to be left by elves, in room of
      one they had stolen. see changeling.

   elf fire, the ignis fatuus. --brewer.

   elf owl zo"ol., a small owl micrathene whitneyi of
      southern california and arizona.
      1913 webster
see also:
elves auf oaf elf arrow elf bolt elf dart 
elf shot elf child changeling elf fire elf owl 
micrathene whitneyi 

[4] : WordNet (r) 2.0

elf
     n 1: folklore fairies that are somewhat mischievous syn: hob,
           gremlin, pixie, pixy, brownie, imp
     2: below 3 kilohertz syn: extremely low frequency
     also: elves pl
see also:
hob gremlin pixie pixy brownie imp 
extremely low frequency elves 

[5] : Moby Thesaurus II by Grady Ward, 1.0

97 moby thesaurus words for "elf":
   ariel, befind, corrigan, dingbelle, fifinella, finnbeara, hob,
   hobgoblin, jd, lilliputian, mab, oberon, puck, titania, tom thumb,
   bad boy, bad fairy, bad peri, banshee, booger, brat, brownie,
   buffoon, bugger, cluricaune, cutup, devil, deviling, devilkin,
   diablotin, dwarf, enfant terrible, erlking, fairy, fairy queen,
   fay, funmaker, gamin, gnome, goblin, gremlin, hob, holy terror,
   homunculus, hood, hoodlum, hooligan, imp, joker, jokester,
   juvenile delinquent, knave, kobold, leprechaun, little devil,
   little monkey, little rascal, manikin, midge, midget, minx,
   mischief, mischief-maker, ouphe, peewee, peri, pip-squeak, pixie,
   poltergeist, pooka, practical joker, prankster, puca, puck, punk,
   punk kid, pwca, pygmy, rapscallion, rascal, rogue, rowdy, ruffian,
   runt, scamp, scapegrace, shrimp, spoiled brat, sprite, sylph,
   sylphid, tokoloshe, urchin, wag, wart, whippersnapper,
   young devil

[6] : Virtual Entity of Relevant Acronyms (Version 1.9, June 2002)

elf
     executable and linkable format unix, os/2
     
     

[7] : The Free On-line Dictionary of Computing (27 SEP 03)

elf
     
        binary format used by system v release 4 unix.
     
     

Elf >> E Words
Elf, definition of term: Elf
elf_pag1.html

Elf Owl >> E Words
Elf Owl, definition of term: Elf Owl
elf+owl_pag1.html