Supersonic

[suːpə'sɒnɪk;sjuː-] or [,supɚ'sɑnɪk]

Definition

(adj.) having frequencies above those of audible sound .

(adj.) (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' .

Edited by Jessica--From WordNet