Wordnet 3.0
NOUN (1)
1. 
 a device to help you walk on deep snow; 
 a lightweight frame shaped like a racquet is strengthened with cross pieces and contains a network of thongs; 
 one is worn on each foot; 
VERB (1)
1. 
 travel on snowshoes; 
- Example: "After a heavy snowfall, we have to snowshoe to the grocery store"
The Collaborative International Dictionary of English v.0.48:
Snowshoe \Snow"shoe`\, n.
   A slight frame of wood three or four feet long and about one
   third as wide, with thongs or cords stretched across it, and
   having a support and holder for the foot; -- used by persons
   for walking on soft snow.
   [1913 Webster]
WordNet (r) 3.0 (2006):
snowshoe
    n 1: a device to help you walk on deep snow; a lightweight frame
         shaped like a racquet is strengthened with cross pieces and
         contains a network of thongs; one is worn on each foot
    v 1: travel on snowshoes; "After a heavy snowfall, we have to
         snowshoe to the grocery store"