/ray"dee oh'/ , n. , pl. radios , adj., v., radioed, radioing .
n.
1. wireless telegraphy or telephony: speeches broadcast by radio.
2. an apparatus for receiving or transmitting radio broadcasts.
3. a message transmitted by radio.
adj.
4. pertaining to, used in, or sent by radio.
5. pertaining to or employing radiations, as of electrical energy.
v.t.
6. to transmit (a message, music, etc.) by radio.
7. to send a message to (a person) by radio.
v.i.
8. to transmit a message, music, etc., by radio.
[ 1910-15; shortening of RADIOTELEGRAPH or RADIOTELEGRAPHY ]