Plain English Meaning
An agreed list of code words pilots and controllers use instead of letters on the radio, so 'B' becomes 'Bravo' and 'D' becomes 'Delta' — making letters impossible to mishear.
Full Definition
The standardized set of code words adopted by the International Civil Aviation Organization to represent each letter of the English alphabet (Alpha, Bravo, Charlie, Delta, Echo, Foxtrot, Golf, Hotel, India, Juliett, Kilo, Lima, Mike, November, Oscar, Papa, Quebec, Romeo, Sierra, Tango, Uniform, Victor, Whiskey, X-ray, Yankee, Zulu) and used in radio communications to spell out letters clearly when transmitting aircraft identifications, taxiway designators, navaid identifiers, and other letter sequences.
Context Anchor
Used in radio communication when spelling aircraft identifiers, waypoint names, procedure names, or any letter that could be misheard.