ul·​tra·​short | \ˌəl-trə-ˈshȯrt \

Definition of ultrashort 

1 : having a wavelength below 10 meters ultrashort radiation

2 : very short in duration an ultrashort pulse of light

Examples of ultrashort in a Sentence

Recent Examples on the Web

Assets in mutual and exchange-traded funds that buy ultrashort-term debt rose to a record $174 billion in April, and inflows are near all-time highs, according to Morningstar. Daniel Kruger, WSJ, "Bond Investors Pour Into Short-Term Funds," 9 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'ultrashort.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of ultrashort

1926, in the meaning defined at sense 1

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The first known use of ultrashort was in 1926

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