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

Between ultrafast charging, game-changing AI camera tricks, and pocket-sized foldable screens that open into mini tablets, these deals will make upgrading feel like a genuine leap forward. — Juhi Wadia, PC Magazine, 30 Sep. 2026

Shrinking and reshaping the light The researchers used an ultrafast laser and engineered its beam so that its energy was concentrated into an extremely small region. — Rupendra Brahambhatt, Interesting Engineering, 26 Sep. 2026

For one, the majority of China’s public charging stations still operate below 1 megawatt, while Geely, BYD and CATL’s ultrafast charging technologies rely on higher charging power to reach their full potential, said Chan at S&P. — ABC News, 24 Sep. 2026

To prevent direct exploitation, the random numbers tick away in the background like an ultrafast clock, changing their value approximately 60 times per second. — Manon Bischoff, Scientific American, 25 Aug. 2026

Word History

First Known Use

1883, in the meaning defined above

Rhymes for ultrafast

• chloroplast
• epiblast
• fibroblast
• opencast
• overcast
• protoplast
• rebroadcast
• telecast
• trophoblast
• unsurpassed
• aghast
• amassed