The Collaborative International Dictionary of English v.0.48:

Sled \Sled\ (sl[e^]d), n. [Akin to D. slede, G. schlitten, OHG.
   slito, Icel. sle[eth]i, Sw. sl[aum]de, Dan. sl[ae]de, and E.
   slide, v. See Slide, and cf. Sledge a vehicle, Sleigh.]
   1. A vehicle on runners, used for conveying loads over the
      snow or ice; -- in England called sledge.
      [1913 Webster]

   2. A small, light vehicle with runners, used, mostly by young
      persons, for sliding on snow or ice.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Sledge \Sledge\, n. [AS. slecge,from sle['a]n to strike, beat.
   See Slay, v. t.]
   A large, heavy hammer, usually wielded with both hands; --
   called also sledge hammer.
   [1913 Webster]

         With his heavy sledge he can it beat.    --Spenser.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Sledge \Sledge\ (sl[e^]j), n. [Perhaps from sleds, pl. of sled,
   confused with sledge a hammer. See Sled, n.]
   1. A strong vehicle with low runners or low wheels; or one
      without wheels or runners, made of plank slightly turned
      up at one end, used for transporting loads upon the snow,
      ice, or bare ground; a sled.
      [1913 Webster]

   2. A hurdle on which, formerly, traitors were drawn to the
      place of execution. [Eng.] --Sir W. Scott.
      [1913 Webster]

   3. A sleigh. [Eng.]
      [1913 Webster]

   4. A game at cards; -- called also old sledge, and all
      fours.
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The Collaborative International Dictionary of English v.0.48:

Sledge \Sledge\ (sl[e^]j), v. i. & t. [imp. & p. p. Sledged
   (sl[e^]jd); p. pr. & vb. n. Sledging.]
   To travel or convey in a sledge or sledges. --Howitt.
   [1913 Webster]

WordNet (r) 3.0 (2006):

sledge
    n 1: a vehicle mounted on runners and pulled by horses or dogs;
         for transportation over snow [syn: sled, sledge,
         sleigh]
    2: a heavy long-handled hammer used to drive stakes or wedges
       [syn: maul, sledge, sledgehammer]
    v 1: transport in a sleigh
    2: ride in or travel with a sledge; "the antarctic expedition
       sledged along the coastline"; "The children sledged all day
       by the lake"
    3: beat with a sledgehammer [syn: sledgehammer, sledge]