noun. an engine that provided medieval artillery used during sieges; a heavy war engine for hurling large stones and other missiles.
1. Noun, singular or mass The difference between a mangonel and an onager is the attachment at the top of the arm. 2. Noun, plural The length will vary with the thickness of the string and the size of the mangonel but could be up to 10 yards for a foot-long catapult.