Wordnet 3.0
VERB (1)
1. 
 jump from an airplane and perform various maneuvers before opening one's parachute; 
[syn: sky dive, skydive]
WordNet (r) 3.0 (2006):
skydive
    v 1: jump from an airplane and perform various maneuvers before
         opening one's parachute [syn: sky dive, skydive]