The Collaborative International Dictionary of English v.0.48:

Leg \Leg\ (l[e^]g), n. [Icel. leggr; akin to Dan. l[ae]g calf of
   the leg, Sw. l[aum]gg.]
   1. A limb or member of an animal used for supporting the
      body, and in running, climbing, and swimming; esp., that
      part of the limb between the knee and foot.
      [1913 Webster]

   2. That which resembles a leg in form or use; especially, any
      long and slender support on which any object rests; as,
      the leg of a table; the leg of a pair of compasses or
      dividers.
      [1913 Webster]

   3. The part of any article of clothing which covers the leg;
      as, the leg of a stocking or of a pair of trousers.
      [1913 Webster]

   4. A bow, esp. in the phrase to make a leg; probably from
      drawing the leg backward in bowing. [Obs.]
      [1913 Webster]

            He that will give a cap and make a leg in thanks for
            a favor he never received.            --Fuller.
      [1913 Webster]

   5. A disreputable sporting character; a blackleg. [Slang,
      Eng.]
      [1913 Webster]

   6. (Naut.) The course and distance made by a vessel on one
      tack or between tacks.
      [1913 Webster]

   7. (Steam Boiler) An extension of the boiler downward, in the
      form of a narrow space between vertical plates, sometimes
      nearly surrounding the furnace and ash pit, and serving to
      support the boiler; -- called also water leg.
      [1913 Webster]

   8. (Grain Elevator) The case containing the lower part of the
      belt which carries the buckets.
      [1913 Webster]

   9. (Cricket) A fielder whose position is on the outside, a
      little in rear of the batter.
      [1913 Webster]

   10. (Math.) Either side of a triangle distinguished from the
       base or, in a right triangle, from the hypotenuse; also,
       an indefinitely extending branch of a curve, as of a
       hyperbola.
       [Webster 1913 Suppl.]

   11. (Telephony) A branch or lateral circuit connecting an
       instrument with the main line.
       [Webster 1913 Suppl.]

   12. (Elec.) A branch circuit; one phase of a polyphase
       system.
       [Webster 1913 Suppl.]

   A good leg (Naut.), a course sailed on a tack which is near
      the desired course.

   Leg bail, escape from custody by flight. [Slang]

   Legs of an hyperbola (or other curve) (Geom.), the branches
      of the curve which extend outward indefinitely.

   Legs of a triangle, the sides of a triangle; -- a name
      seldom used unless one of the sides is first distinguished
      by some appropriate term; as, the hypothenuse and two legs
      of a right-angled triangle.

   On one's legs, standing to speak.

   On one's last legs. See under Last.

   To have legs (Naut.), to have speed.

   To stand on one's own legs, to support one's self; to be
      independent.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Leg \Leg\ (l[e^]g), v. t.
   To use as a leg, with it as object:
   (a) To bow. [Obs.]
   (b) To run. [Low]
       [1913 Webster]

WordNet (r) 3.0 (2006):

leg
    n 1: a human limb; commonly used to refer to a whole limb but
         technically only the part of the limb between the knee and
         ankle
    2: a structure in animals that is similar to a human leg and
       used for locomotion
    3: one of the supports for a piece of furniture
    4: a part of a forked or branching shape; "he broke off one of
       the branches" [syn: branch, leg, ramification]
    5: the limb of an animal used for food
    6: a prosthesis that replaces a missing leg [syn: peg, wooden
       leg, leg, pegleg]
    7: a cloth covering consisting of the part of a pair of trousers
       that covers a person's leg
    8: (nautical) the distance traveled by a sailing vessel on a
       single tack
    9: a section or portion of a journey or course; "then we
       embarked on the second stage of our Caribbean cruise" [syn:
       stage, leg]

Moby Thesaurus II by Grady Ward, 1.0:

124 Moby Thesaurus words for "leg":
   ambulate, ankle, appendage, arm, assist, bayonet legs, boost,
   bough, bowlegs, branch, break, breast, broken circuit, calf,
   chicken foot, circuit, circuital field, circumambulate,
   closed circuit, cnemis, complete circuit, course, crossing, cruise,
   dark meat, dead circuit, drumstick, foot, foot it, foreleg,
   galvanic circuit, gamb, gambrel, giblets, gigot, ham, hand,
   helping hand, hind leg, hock, hoof it, hot circuit, imp, jamb,
   jaywalk, jog on, joint, knee, lateral circuit, leg it, leg up,
   lift, limb, link, live circuit, lobe, lobule, loop,
   magnetic circuit, member, microcircuit, multiple circuit,
   multiple series, neck, ocean trip, offshoot, organ, oyster, pace,
   pad, pale, palisade, passage, path, pedestrianize, peg,
   perambulate, peripateticate, picket, pile, pinion, podite,
   popliteal space, printed circuit, ramification, run, runner, sail,
   scion, scissor-legs, sea trip, series multiple, shakedown cruise,
   shank, shin, short, short circuit, shuffle along, spile, spray,
   sprig, spur, stake, stems, step, stride, stump it, stumps, switch,
   tail, tarsus, tendril, thigh, traipse, tread, trotters,
   turkey foot, twig, vector field, voyage, walk, white meat, wing,
   wishbone