Noun

1. A vehicle capable of atmospheric flight due to interaction with the air, such as buoyancy or lift.

Usage notes

• The word aircraft is a countable noun, but with the same plural form as singular; hence "one aircraft", "two aircraft", etc.
• When the term aircraft is used without qualification, it is not usually taken to include rocket aircraft.
• An aircraft with a propulsion system is also termed airplane/aeroplane.