(communication, aviation, nautical, navigation) A beacon that emits radio wave signals to guide ships or aircraft or to indicate the position of a ship, aircraft, or other object, person, or vehicle.

An alarm clock that includes a radio; a radio alarm clock

(physics) The energy transmitted by radio-frequency electromagnetic radiation

Any of a line of preset buttons on a car radio used to select the station to be listened to; pressing one releases the others

A broadcast station from which radio programs are transmitted.

plural of radio telescope

plural of radio station

The transmission of Morse code (etc) using radio

A person who studies radio astronomy.

plural of radio astronomer