PathfinderPronunciation: /ˈpɑːθfʌɪndə(r)/ (in full Mars Pathfinder)Definition of Pathfinder an unmanned American spacecraft which landed on Mars in 1997, deploying a small robotic rover (Sojourner) to explore the surface and examine the rocks. Pathfinder in other Oxford dictionaries Definition of Pathfinder in the US English dictionary
