常作集合名词，也指一架飞机或飞行器，单复数同形，含义广泛，可指直升机、飞艇等。指有发动机或没有发动机的任何种类的飞行器。包括一般飞机、直升机、飞艇、火箭、气球等。用作主语时，谓语动词一般按所指实际数量选用单数形式或复数形式。aircraft在句中也常用作定语。aeroplane ，airplane， plane这些名词均有“飞机”之意。
The aircraft overshot the runway.
The aircraft and its crew were posted missing.
The use of cellular phones is not permitted on most aircraft.
Even by present-day standards these were large aircraft.
Even quite small aircraft occupy a lot of space
The aircraft is designed to withstand turbulent conditions.
The aircraft was flying in a northerly direction.
Their aircraft went down during a training exercise.
He had returned to England in an aircraft carrier no less
The aircraft carrier has been docked there since last month.
an aircraft carrier航空母舰
Aircraft passed overhead with monotonous regularity.
The aeroplane will travel at twice the speed of sound.
The oldest of the aircraft were scrapped.
Tomorrow he would tell his pilot to get the aircraft ready
Since its inception the company has produced 53 different aircraft designs.
Wave after wave of aircraft passed overhead.
The airlines still have 2,500 new aeroplanes on order.
Airplanes enable people to travel through the air.
Fancy! She’s never been in a plane before.