Pronunciation: (path'fīn"dur, päth'-),[key] —n. 1. a person who finds or makes a path, way, route, etc.,esp. through a previously unexplored or untraveled wilderness.
2. an airplane, or a person dropped from a plane, sent into a target area to illuminate the area for succeeding aircraft.
3. a radar beacon beamed into a target area to provide guidance for missiles seeking the target.