catapult in WordNet English dictionary

1. an engine that provided medieval artillery used during sieges; a heavy war engine for hurling large stones and other missiles
   catapult  arbalest  arbalist  ballista  bricole  mangonel  onager  trebuchet  trebucket 
   
2. a plaything consisting of a Y-shaped stick with elastic between the arms; used to propel small stones
   slingshot  sling  catapult 
   
3. a device that launches aircraft from a warship
   catapult  launcher 
   

1. shoot forth or launch, as if from a catapult
   "the enemy catapulted rocks towards the fort"
   catapult 
   
2. hurl as if with a sling
   sling  catapult