A pilot is a person who operates an aircraft, and there are many different terms used to describe this profession. The term 'LEAD' is often used to refer to the pilot in charge of a flight, while 'USHER' can be used to describe someone who guides passengers on board. An 'ACE' is a highly skilled pilot, and 'TEST' can refer to a pilot who tests new aircraft. A 'FLIER' is another term for a pilot, as is a 'GUIDE' or 'STEER'. An 'AIRMAN' is a military pilot, and 'AVIATE' is a verb meaning to fly. A 'FLYBOY' is a slang term for a pilot, while an 'AVIATOR' is a more formal term. A 'SKIPPER' is a captain of an aircraft, and a 'HELMSMAN' is a pilot who steers the plane. A 'cloudhopper' is a slang term for a pilot who flies low, and a 'highandmighty' is a slang term for a pilot who flies high.