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ultrashort

American

[uhl-truh-shawrt] / ˌʌl trəˈʃɔrt /

adjective

extremely short.
(of a wavelength) smaller than 10 meters.

ultrashort British

/ ˌʌltrəˈʃɔːt /

adjective

(of a radio wave) having a wavelength shorter than 10 metres

"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 ultrashort

First recorded in 1925–30; ultra- + short

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:

ultrashort

For “strategic cash” that can sit for six to 12 months, she believes an ultrashort fund is ideal.

From MarketWatch ● Oct. 7, 2026

“We expect positive returns for ultrashort even if rates continue to rise,” Joanne Driscoll, Franklin Templeton’s head of short-term liquid markets, told MarketWatch.

From MarketWatch ● Oct. 7, 2026

But even transferring cash to an ultrashort bond fund could deliver a higher yield than a money-market fund, Royal said.

From The Wall Street Journal ● Aug. 12, 2026

Near-cash instruments like ultrashort bond funds yield even higher but won’t be hurt badly if interest rates continue to rise.

From Barron's ● May 30, 2026

Lasers that produce ultrashort light pulses deliver exceptional precision for manufacturing, medicine, and scientific studies.

From Science Daily ● Nov. 9, 2025

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023