Range finder Meaning, Definition & Usage

  1. noun a measuring instrument (acoustic or optical or electronic) for finding the distance of an object
    rangefinder.

WordNet

Definitions
  1. (Gunnery), an instrument, or apparatus, variously constructed, for ascertaining the distance of an inaccessible object, used to determine what elevation must be given to a gun in order to hit the object; a position finder.

Webster 1913