subsonic

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Definitions from WordNet

Adjective subsonic has 1 sense

subsonic - (of speed) less than that of sound in a designated medium; "aircraft flying at subsonic speeds"
Antonyms: supersonic, sonic, transonic

Definitions from the Web

Subsonic

Definition: Subsonic refers to a speed or sound that is lower than the speed of sound in air, which is approximately 343 meters per second.

Parts of Speech:

Adjective
Noun

Senses and Usages:

Adjective:

1. (Physics) Being or relating to a speed or sound that is lower than the speed of sound in air.

Example sentence: The subsonic aircraft glided smoothly through the air, quietly surpassing the speed of its predecessors.

Noun:

1. (Music) A genre of music characterized by having a tempo slower than the prevailing musical style.

Example sentence: The band impressed the audience with their soulful subsonics during the live performance.