Transonic

adj

adj ·Rare ·Advanced level

Definitions

Adjective
  1. 1
    Just below, or just above, the speed of sound (0.8 < Ma < 1.2 approximately). not-comparable
  2. 2
    Passing from subsonic to supersonic, or vice versa. not-comparable
  3. 3
    Travelling through a fluid (commonly air) at a speed where regions of supersonic and subsonic flow coexist simultaneously over different portions of the surface of the moving object in question. not-comparable
Adjective
  1. 1
    (of speed) having or caused by speed approximately equal to that of sound in air at sea level wordnet

Synonyms

All synonyms
acousticacousticalhypersonicphonicplasmasonicsonic

Example

More examples

"A swept wing delays the onset of shockwaves at transonic speeds, improving the aerodynamic performance of high-speed jets."

Etymology

From trans- + sonic.

Related phrases

sound barrierspeed of soundvice versa

More for "transonic"

SynonymsSentencesPronunciationTranslate

Next best steps

Find stronger synonymsSee usage examplesCheck pronunciationBrowse writing guides

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.