A cylindrical tube of pasteboard or metal filled with a mixture of niter, sulphur, charcoal, etc., which, on being ignited at the base, propels the tube forward by the impact of the liberated gases against the atmosphere, A blunt lance head used in the joust, any vehicle self-propelled by a rocket engine, verb_ propel with a rocket, To attack something with rockets, To accelerate swiftly and powerfully, intransitive verb_ (Sporting), engraving To rise straight up; said of birds; usually in the present participle or as an adjective,