<p><strong>Noun</strong></p><ul><li>a guiding or warning signal, as a light or fire, especially one in an elevated position.</li><li>a tower or hill used for such purposes.</li><li>a lighthouse, signal buoy, etc., on a shore or at a dangerous area at sea to warn and guide vessels.</li><li>Navigation. radio beacon.</li><li>a radar device at a fixed location that, upon receiving a radar pulse, transmits a reply pulse that enables the original sender to determine their position relative to the fixed location.</li><li>a person, act, or thing that warns or guides.</li><li>a person or thing that illuminates or inspires: The Bible has been our beacon during this trouble.</li><li>Digital Technology. web beacon.</li><li>a low-energy radio transmitter at a specific location within a store, museum, office space, etc., which identifies nearby mobile devices in order to send them location-specific messages or collect location-specific data: There must be a beacon in the luggage aisle because I just got a coupon for this suitcase on my phone.</li></ul><p><strong>Verb</strong></p><ul><li>(used with object) to serve as a beacon to; warn or guide.</li><li>to furnish or mark with beacons: a ship assigned to beacon the shoals.</li><li>(used without object) to serve or shine as a beacon: A steady light beaconed from the shore.</li></ul>