SUBSONIC

Pronunciation (US):

(GB):

 I. (adjective) 

Sense 1

Meaning:

(of speed) less than that of sound in a designated medium

Example:

aircraft flying at subsonic speeds

Classified under:

Adjectives

Antonym:

sonic ((of speed) having or caused by speed approximately equal to that of sound in air at sea level)

supersonic ((of speed) greater than the speed of sound in a given medium (especially air))

Credits