'Ballista' definitions:
Definition of 'ballista'
From: WordNet
Definition of 'Ballista'
From: GCIDE
- Ballista \Bal*lis"ta\, n.; pl. Ballist[ae]. [L. ballista, balista, fr. Gr. ba`llein to throw.] An ancient military engine, in the form of a crossbow, used for hurling large missiles. [1913 Webster]