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ultrafast

American  
[uhl-truh-fast, -fahst] / ˌʌl trəˈfæst, -ˈfɑst /

adjective

  1. extremely fast.

    ultrafast computers.


ultrafast British  
/ ˈʌltrəˌfɑːst /

adjective

  1. extremely fast

    an ultrafast internet connection

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of ultrafast

ultra- + fast 1


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.

See Examples For:

To make this possible, the engineers used a specialized ultrafast laser and carefully modified the shape and size of its beam.

From Science Daily ● Oct. 27, 2026

The technique works by concentrating laser energy into an extremely small region and delivering a sequence of ultrafast pulses.

From Science Daily ● Oct. 27, 2026

The automaker rivals ultrafast charging from BYD as automakers aim to entice buyers in China’s slowing market.

From The Wall Street Journal ● Sep. 24, 2026

BYD has made its ultrafast charging a key selling point for its electric vehicles.

From The Wall Street Journal ● Sep. 23, 2026

What would happen if that alien horror simply slashed out with one ultrafast hand and showed Colonel Mannheim and all his watching technicians that they had completely underestimated his alien ability?

From Anything You Can Do ... by Randall Garrett

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