It’s faster than the speed of sound, it’s supersonic! Seriously. Supersonic describes things that can travel faster than the speed of sound, like the passenger jet Concorde that used to zip from New York to London in under four hours.

Anything supersonic is so fast that you see it before you hear it. A high-speed fighter jet is supersonic, but there aren't any supersonic passenger planes since Concorde's retirement in 2003. Space shuttles and modern bullets are still supersonic. Originally, the word supersonic meant "having to do with sound waves beyond human hearing," but by 1934 it described movement exceeding the speed of sound, with ultrasonic taking on the old meaning. Sonic comes from the Latin sonus, or "sound."

Definitions of supersonic
  1. adjective
    (of speed) greater than the speed of sound in a given medium (especially air)
    “a supersonic bomber flies so fast that it must release its bombs while the target is still over the horizon”
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    sonic, transonic
    (of speed) having or caused by speed approximately equal to that of sound in air at sea level
    (of speed) less than that of sound in a designated medium
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  2. adjective
    having frequencies above those of audible sound
    synonyms: ultrasonic
    inaudible, unhearable
    impossible to hear; imperceptible by the ear
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