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A security officer who travels undercover on a commercial airliner to prevent hijacking or terrorist activity.
1. (Military) a senior Royal Air Force officer of equivalent rank to a vice admiral in the Royal Navy
2. (Military) a Royal Australian Air Force officer of the highest rank
3. (Military) a Royal New Zealand Air Force officer of the highest rank when chief of defence forces
4. a person employed to travel as an armed guard on commercial flights to protect against hijacking
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|Noun||1.||air marshal - a person trained by the government in hijacking and terrorist tactics who (for security reasons) is a passenger aboard an airline flight|
act of terrorism, terrorism, terrorist act - the calculated use of violence (or the threat of violence) against civilians in order to attain goals that are political or religious or ideological in nature; this is done through intimidation or coercion or instilling fear