Aircraft

Aircraft (/ɛərkræft/) is a term used to define a manmade object capable of producing lift and thus achieving flight.

Difference Between Aircraft and Plen
An aircraft is the traditional method of human flight, and may include examples such as the Avro Vulcan, Boeing 737, Fokker Dr.I, or the Goodyear Blimp. Meanwhile a plen is a non-traditional method of flight that may or may not be related to humans in any way. Examples of plen include Charlie Kelly, Flying Spaghetti Monster, Slappy Seal, or Walrider.