| ADJECTIVE | all | subsonic | (of speed) less than that of sound in a designated medium |
|---|
| Meaning | (of speed) less than that of sound in a designated medium. | |
|---|---|---|
| Example | "aircraft flying at subsonic speeds" | |
| Opposite | sonic, transonic | (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) | |
| Spanish | subsónico | |
| Catalan | subsònic | |
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