ultrafast

adjective
ul·​tra·​fast | \ ˌəl-trə-ˈfast How to pronounce ultrafast (audio) \

Definition of ultrafast

: extremely or extraordinarily fast ultrafast trains ultrafast speeds an ultrafast wireless connection

First Known Use of ultrafast

1883, in the meaning defined above

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The first known use of ultrafast was in 1883

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Cite this Entry

“Ultrafast.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/ultrafast. Accessed 11 December 2019.

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