missile

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun An object or weapon that is fired, thrown, dropped, or otherwise projected at a target; a projectile.
• noun A guided missile.
• noun A ballistic missile.

from The Century Dictionary.

• Capable of being thrown; adapted to be hurled by the hand, or discharged from a weapon, as from a sling, bow, or gun, or from a military engine.
• noun Anything thrown for the purpose of hitting something; specifically, a weapon or projectile designed for throwing or discharging, as a lance, an arrow, a bullet, or a cannon-ball.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Capable of being thrown; adapted for hurling or to be projected from the hand, or from any instrument or engine{2}, so as to strike an object at a distance.
• noun A weapon thrown or projected or intended to be projected, as a lance, an arrow, or a bullet.
• noun A rocket-propelled device designed to fly through the air and deliver a warhead of explosive materials to a target.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun An object intended to be launched into the air at a target.
• noun military A self-propelled projectile whose trajectory can be adjusted after having been launched.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a weapon that is forcibly thrown or projected at a targets but is not self-propelled
• noun a rocket carrying a warhead of conventional or nuclear explosives; may be ballistic or directed by remote control