(figuratively) To attack something or someone by directing objects at them.
(physics) To direct at a substance an intensestream of high-energy particles, usually sub-atomic or made of at most a few atoms.
Exempel
They planted in divers places twelve great bombards, wherewith they threw huge stones into the air, which, falling down into the city, might break down the houses.
[...] yond same black cloud, yond huge one, / looks like a foul bombard that would shed his liquor.