Definition
The use of radio equipment to transmit and receive voice communications between aircraft and ground stations, or between aircraft, using standardized phraseology and procedures.
Plain English
Talking and listening over the radio, using set words and procedures, to communicate while flying.
Context Anchor
Seen in radio communication procedures, air traffic control communications, and pilot training material about proper radio use.
Derivation
From Latin 'radius' (ray, as in radio waves) and Greek 'tele' (far) plus 'phone' (sound or voice). Literally 'far-voice by radio' -- voice communication carried over a distance by radio waves. This helps distinguish it from radiotelegraphy, which sends coded signals (like Morse) rather than spoken words.
Why Pilots Care
Clear radiotelephony prevents misunderstandings that could lead to safety incidents or airspace violations.
Intuition Check
Radiotelephony is not a telephone call. In aviation, it means voice communication carried by radio.
Example Sentence 1
Student pilots practice standard radiotelephony before their first solo cross-country flight.
Example Sentence 2
Standard radiotelephony phraseology helps controllers understand calls quickly even in busy airspace.