![rangefinder rangefinder](https://www.tekportal.net/wp-content/uploads/2018/11/rangefinder.jpg)
noun
- any of various instruments for determining the distance from the observer to a particular object, as for sighting a gun or adjusting the focus of a camera.
noun
- an instrument for determining the distance of an object from the observer, esp in order to sight a gun or focus a camera
- another word for tacheometer