The Collaborative International Dictionary of English v.0.48:

luge \luge\ (l[=oo]zh), n.
   a racing sled for one or two people; it is raced down a chute
   of packed snow or ice, and the occupant(s) lie down on it
   with feet in the direction of motion.
   [WordNet 1.5 +PJC]

WordNet (r) 3.0 (2006):

luge
    n 1: a racing sled for one or two people
    v 1: move along on a luge or toboggan [syn: toboggan, luge]