guided missile

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

• noun A self-propelled missile that can be guided while it is in flight.

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

• noun An unmanned, self-propelled vehicle that travels through the air to deliver a warhead to a predetermined point, keeping itself on course by making corrections via its control surfaces.

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

• noun a rocket-propelled missile whose path can be controlled during flight either by radio signals or by internal homing devices