noun
: a radio beacon that transmits in such a way as to mark out a fixed straight line (as for directing the course of airplanes to or from a landing field)
noun
: a radio beacon that transmits in such a way as to mark out a fixed straight line (as for directing the course of airplanes to or from a landing field)
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012