Antonyms for supersonic

Grammar : Adj, noun

Spell : soo-per-son-ik

Phonetic Transcription : ˌsu pərˈsɒn ɪk

Definition of supersonic

Origin : 1919, "of or having to do with sound waves beyond the limit of human hearing," from super- + sonic. Attested from 1934 in sense of "exceeding the speed of sound" (especially as a measure of aircraft speed), leaving the original sense to ultrasonic (1923).

As in speedy : adj fast, quick
As in swift : adj very fast
As in fast : adj speedy
As in jet : noun vehicle propelled by ejection of pressurized gas or liquid

Example sentences :

It coughed once, sending a beam of supersonic energy into the bodies of both men.
Extract from : « The Penal Cluster » by Ivar Jorgensen (AKA Randall Garrett)

During the next two days, events moved with supersonic speed for the Cubs.
Extract from : « Dan Carter Cub Scout » by Mildred A. Wirt

Lee stared at the apparition which swiftly materialized out of the ground haze at the plane's supersonic speed.
Extract from : « The Brain » by Alexander Blade

Flying at supersonic speed, they reached the area of the lost missile in the South Atlantic soon after lunch.
Extract from : « Tom Swift and the Electronic Hydrolung » by Victor Appleton

A tiny doll, proportioned like a woman, dashed toward me, shrilling in a supersonic shriek.
Extract from : « The Door Through Space » by Marion Zimmer Bradley

Instantly he was batted on the nose from above by a paw that moved with supersonic speed.
Extract from : « The Electronic Mind Reader » by John Blaine

The massive plane flew at supersonic speeds and was equipped with jet lifters for vertical take-off or hovering.
Extract from : « Tom Swift and The Visitor from Planet X » by Victor Appleton

Gunning the jet motors, he sent the big cargo ship arrowing forward at supersonic velocity.
Extract from : « Tom Swift and The Visitor from Planet X » by Victor Appleton

A wave of some sort—probably subsonic or supersonic—continuously filled the Vininese atmosphere.
Extract from : « The Instant of Now » by Irving E. Cox, Jr.

Within a week, they had determined there was indeed a broad range of supersonic frequencies capable of precipitating the dust.
Extract from : « The Year When Stardust Fell » by Raymond F. Jones

Synonyms for supersonic

Based on : Thesaurus.com - Gutenberg.org - Dictionary.com - Random House Unabridged Dictionary, © Random House, Inc. 2019