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
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
Amazon is simultaneously piloting new logistics models aimed at ultrafast delivery, including Amazon Now, a service that promises 30-minute delivery of groceries and household items in select parts of Seattle and Philadelphia.
—Associate News Editor, MSNBC Newsweek, 4 Dec. 2025
With efficiency doubled, size slashed, and complexity reduced, this palm-sized laser may reshape how ultrafast optical tools move from the lab into the real world.
—Neetika Walter, Interesting Engineering, 6 Nov. 2025
The pack, which is shielded to prevent or limit damage in a collision, is part of an advanced 800-volt architecture for ultrafast DC charging.
—IEEE Spectrum, 5 Nov. 2025
See All Example Sentences for ultrafast
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Joe Rao, Space.com, 7 Dec. 2025
Amazon is simultaneously piloting new logistics models aimed at ultrafast delivery, including Amazon Now, a service that promises 30-minute delivery of groceries and household items in select parts of Seattle and Philadelphia.
—Associate News Editor, MSNBC Newsweek, 4 Dec. 2025
With efficiency doubled, size slashed, and complexity reduced, this palm-sized laser may reshape how ultrafast optical tools move from the lab into the real world.
—Neetika Walter, Interesting Engineering, 6 Nov. 2025
The pack, which is shielded to prevent or limit damage in a collision, is part of an advanced 800-volt architecture for ultrafast DC charging.
—IEEE Spectrum, 5 Nov. 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 9 Dec. 2025.
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