Each of two or more beacons or lighthouses used as a navigational aid, appearing in alignment to shipping which is following a safe course, especially through a narrow channel.
Origin
Mid 19th century.
Definition of range light in US English:
range light
noun
North American Nautical
Each of two or more beacons or lighthouses used as a navigational aid, appearing in alignment to shipping which is following a safe course, especially through a narrow channel.