Subsonic
Pronunciation: /ˈsəbˈsɑnɪk/
Subsonic (adjective)
- Moving at a speed less than the speed of sound.
- Producing sound that is quieter than usual.
Examples
- The aircraft flew at subsonic speeds to conserve fuel.
- Subsonic travel is often more economical than supersonic travel.
Common collocations: subsonic speed, subsonic flight, subsonic hum, subsonic noise