subsonic
adjective
sub·son·ic
ˌsəb-ˈsä-nik 
1
: of, relating to, or being a speed less than that of sound in air
2
: moving, capable of moving, or utilizing air currents moving at a subsonic speed
Examples of subsonic in a Sentence
Recent Examples on the Web
With a frequency range starting at a subsonic 4Hz and extending to a bat-squeaking 96kHz, these headphones have a tonality enhanced with high-frequency sparkle but with a comfortable sound signature.
—
Mark Sparrow, Forbes, 20 Feb. 2025
The demonstrator flew 10 more subsonic flights, then went supersonic for the first time on Jan. 28 of this year.
—Mike Wall, Space.com, 11 Feb. 2025
Overture’s medium-bypass turbofan engine, Symphony, will run on sustainable aviation fuel and produce noise levels comparable to subsonic jets, unlike Concorde’s deafening, CO2-emitting afterburners.
—IEEE Spectrum, 8 Feb. 2025
The commercial Overture airliners will be able to carry 64 to 80 passengers at Mach 1.7, about twice the speed of today’s subsonic airliners, meaning a flight could cross the Atlantic in just about 3 1/2 hours.
—Mary Walrath-Holdridge, USA TODAY, 29 Jan. 2025
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Mark Sparrow, Forbes, 20 Feb. 2025
The demonstrator flew 10 more subsonic flights, then went supersonic for the first time on Jan. 28 of this year.
—Mike Wall, Space.com, 11 Feb. 2025
Overture’s medium-bypass turbofan engine, Symphony, will run on sustainable aviation fuel and produce noise levels comparable to subsonic jets, unlike Concorde’s deafening, CO2-emitting afterburners.
—IEEE Spectrum, 8 Feb. 2025
The commercial Overture airliners will be able to carry 64 to 80 passengers at Mach 1.7, about twice the speed of today’s subsonic airliners, meaning a flight could cross the Atlantic in just about 3 1/2 hours.
—Mary Walrath-Holdridge, USA TODAY, 29 Jan. 2025
See all Example Sentences for subsonic
Dictionary Entries Near subsonic
Cite this Entry
“Subsonic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/subsonic. Accessed 24 Feb. 2025.
Copy CitationKids Definition
subsonic
adjective
sub·son·ic
ˌsəb-ˈsän-ik
ˈsəb-
1
: of, relating to, or being a speed less than that of sound in air
2
: moving, capable of moving, or using air currents moving at a subsonic speed
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