At cruise altitude (35,000-40000 feet) it goes at Mach 0.85 (that is to say, 85% of the speed of sound) which translates in a ground speed of about 570 mph or 915 km/h, but it can go as fast as Mach 0.92 (614 mph, 988 km/h) should the need arise.
â¢ VAST (adjective). The adjective VAST has 1 sense: 1. unusually great in size or amount or degree or especially extent or scope. Familiarity information: VAST used as an adjective is very rare.
Define huge: very large or extensive: such as; of great size or area; great in scale or degree â huge in a sentence