radiosignal
nounUK /ˈreɪdiəʊ ˈsɪɡnəl/
US /ˈreɪdioʊ ˈsɪɡnəl/
A radio signal is a special kind of invisible wave that carries sounds or messages through the air.
The little robot picked up a radio signal from far away.
RELATED WORDS
OTHER MEANINGS
2. A signal sent by a radio station to reach listeners.
We lost the radio signal when we drove into the tunnel.
3. Electronic data carried by radio waves between devices.
The drone sends a radio signal back to its controller.
4. A detectable transmission used to find or track something.
Scientists listened for a radio signal from the distant spacecraft.