scan
(Engineering) 1. To examine an area, a region in space, or a portion of the radio spectrum point by point in an ordered sequence; for example, conversion of a scene or image to an electric signal or use of radar to monitor an airspace for detection, navigation, or traffic control purposes. 2. One complete circular, up-and-down, or left-to-right sweep of the radar, light, or other beam or device used in making a scan.
