[ uhl-truh-fast, -fahst ]
/ ˌʌl trəˈfæst, -ˈfɑst /
extremely fast: ultrafast computers.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
Example sentences from the Web for ultrafast
Stanton paused imperceptibly before answering, while his ultrafast mind considered the problem and arrived at a decision.Anything You Can Do|Gordon Randall Garrett
Stanton paused imperceptibly before answering, while his ultrafast mind considered the problem before arriving at a decision.Anything You Can Do ...|Gordon Randall Garrett
British Dictionary definitions for ultrafast
/ (ˈʌltrəˌfɑːst) /
extremely fastan 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