NOUN (1)

1. a board with wheels that is ridden in a standing or crouching position and propelled by foot;


VERB (1)

1. ride on a flat board with rollers attached to the bottom;

WordNet (r) 3.0 (2006):

skateboard
    n 1: a board with wheels that is ridden in a standing or
         crouching position and propelled by foot
    v 1: ride on a flat board with rollers attached to the bottom

Moby Thesaurus II by Grady Ward, 1.0:

25 Moby Thesaurus words for "skateboard":
   coast, flit, flow, fly, glide, glissade, ice skates, ice-skate,
   roller skates, roller-skate, sail, sideslip, skate, skates, ski,
   skid, skim, sled, sleigh, slide, slip, slither, snowshoes, sweep,
   toboggan