BALLISTA Meaning of BALLISTA in English [ bə'lɪstə ]■ noun ( plural ~e -sti: or ~s ) a catapult used in ancient warfare for hurling large boulders.OriginC16: from L., based on Gk ballein 'to throw'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004