finder Definition

one that finds

a small astronomical telescope of low power and wide field attached to a larger telescope for finding an object

viewfinder

a radio receiving device for determining the direction of incoming radio waves that typically consists of a coil antenna rotating freely on a vertical axis

one that tries to determine the realities of a case, situation, or relationship; especially : an impartial examiner designated by a government agency to appraise the facts underlying a particular matter (such as a labor dispute)

an instrument used in gunnery to determine the distance of a target

a surveying instrument (such as a transit) for determining quickly the distances, bearings, and elevations of distant objects

a usually built-in adjustable optical device for focusing a camera that automatically indicates the correct focus (as when two parts of a split image are brought together)