(noun, adjective, verb)


1. indicating radiation or radioactivity

- radiochemistry


1. medium for communication

Similar word(s): radiocommunication, wireless

Definition categories: communication, broadcasting

2. an electronic receiver that detects and demodulates and amplifies transmitted signals

Similar word(s): tuner, wireless

Definition categories: man–made, receiver

3. a communication system based on broadcasting electromagnetic waves

Similar word(s): wireless

Definition categories: man–made


1. transmit messages via radio waves

- he radioed for help

Definition categories: communication, communicate, intercommunicate

Sentences with radio as a verb:

- I think the boat is sinking; we'd better radio for help. / I radioed him already. / Radio the coordinates this time. / OK. I radioed them the coordinates.