sonic
Americanadjective
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of or relating to sound.
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noting or pertaining to a speed equal to that of sound in air at the same height above sea level.
adjective
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of, involving, or producing sound
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having a speed about equal to that of sound in air: 331 metres per second (741 miles per hour) at 0°C
Other Word Forms
Etymology
Origin of sonic
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Explanation
The adjective sonic means related to audible sound or to the speed of sound waves. If something goes faster than the speed of sound, it creates a sonic boom, a shock wave that sounds like an explosion. The adjective sonic was coined in the 1920s, from the Latin sonus, or "sound." Ever since, it's been used not only to describe things relating to sound, but also things that travel as fast as sound. The Sonic fast food chain originally advertised "Service With the Speed of Sound." A super-fast Japanese express train is called Sonic. And the Sonic the Hedgehog video games feature a speedy main character.
Vocabulary lists containing sonic
Common Senses: Son ("Sound")
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Lend Me Your Ears: Sound Words
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My Life as an Ice Cream Sandwich
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
A meteor streaked across the New York City area in broad daylight on July 16, 2024, producing a sonic boom as it passed just south of the Statue of Liberty.
From Science Daily ● Aug. 8, 2026
Witnesses told the BBC it sounded "like a bomb" and compared it to a "sonic boom".
From BBC ● Jul. 25, 2026
Even so, sonic adventurers, beginning with Leopold Stokowski in the 1930s, experimented with amplification in an obsessive, seemingly quixotic effort to locate a mythical sonic grail on the Cahuenga Pass.
From Los Angeles Times ● Jul. 16, 2026
Yet another “no,” the song’s final word, becomes its own tiny sonic event—wavering then piercing, sliding way up in pitch, more released than sung.
From The Wall Street Journal ● Jul. 11, 2026
We hear the crack of a bullwhip because its tip is moving faster than the speed of sound, creating a shock wave, a small sonic boom.
From "Cosmos" by Carl Sagan
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
