The Antonov An-225 Mriya (Ukrainian: Антонов Ан-225 Мрія, Dream, NATO reporting name: 'Cossack') is a strategic airlift cargo aircraft, designed by the Antonov Design Bureau in the 1980s. It is the world's heaviest aircraft. The design, built in order to transport the Buran orbiter, was an enlargement of the successful An-124 Ruslan. The An-225's name, Mriya (Мрiя) means "Dream" (Inspiration) in Ukrainian.
The first An-225 was completed in 1988 and a second An-225 has been partially completed. The one An-225 is in commercial operation with the Antonov Airlines carrying oversized payloads.