n. An airplane maneuver in which the pilot deads downward at a steep angle while the engines are operating at or near full power; -- a method to descend rapidly. [ WordNet 1.5 ]

v. i. To make a power dive, as of an airplane. [ WordNet 1.5 ]

v. t. To cause (an airplane) to make a power dive; as, he power-dived his plane to escape the attackers. [ WordNet 1.5 ]