ultrafast
adjective
ul·tra·fast
ˌəl-trə-ˈfast 
: extremely or extraordinarily fast
ultrafast trains
ultrafast speeds
an ultrafast wireless connection
Examples of ultrafast in a Sentence
Recent Examples on the Web
Treutelaar also has the typical tools, including ultrafast hand-to-hand snap times and pinpoint accuracy.
—
Steve Reaven, Chicago Tribune, 5 Feb. 2026
The infrastructure passed national acceptance in February 2025 and brings together ultra-low temperatures, strong magnetic fields, ultra-high pressure, and ultrafast optical systems in one location.
—Sujita Sinha, Interesting Engineering, 28 Jan. 2026
But homes also need ultrafast Wi-Fi for laptops and phones and streaming video.
—IEEE Spectrum, 25 Dec. 2025
Compare that to 37 miles per second for the swift Perseids, 41 for the very swift Orionids, and 45 for the ultrafast Leonids.
—Joe Rao, Space.com, 7 Dec. 2025
See All Example Sentences for ultrafast
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Steve Reaven, Chicago Tribune, 5 Feb. 2026
The infrastructure passed national acceptance in February 2025 and brings together ultra-low temperatures, strong magnetic fields, ultra-high pressure, and ultrafast optical systems in one location.
—Sujita Sinha, Interesting Engineering, 28 Jan. 2026
But homes also need ultrafast Wi-Fi for laptops and phones and streaming video.
—IEEE Spectrum, 25 Dec. 2025
Compare that to 37 miles per second for the swift Perseids, 41 for the very swift Orionids, and 45 for the ultrafast Leonids.
—Joe Rao, Space.com, 7 Dec. 2025
See All Example Sentences for ultrafast
Cite this Entry
“Ultrafast.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ultrafast. Accessed 7 Feb. 2026.
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