Relating to or capable of speeds equal to or exceeding five times the speed of sound (Mach 5 and above).
Designating, of, or moving at a speed in a surrounding fluid greater than that of sound in the same fluid
The definition of sonic is something related to sound or the speed of sound.
Find another word for subsonic. In this page you can discover 8 synonyms, antonyms, idiomatic expressions, and related words for subsonic, like: speed of sound, hypersonic, supersonic, transonic, sonic, sub-sonic, freestream and downwash.