uni·​di·​rec·​tion·​al ˌyü-ni-də-ˈrek-sh(ə-)nəl How to pronounce unidirectional (audio)
: involving, functioning, moving, or responsive in a single direction
a unidirectional microphone
: not subject to change or reversal of direction
unidirectionally adverb

Examples of unidirectional in a Sentence

Recent Examples on the Web The sleek timepiece features a 41 mm steel case, a unidirectional rotating bezel in black ceramic, a screw-in crown, and a helium escape valve at 11 o’clock. Rachel Cormack, Robb Report, 16 Aug. 2023 Most annual reviews are unidirectional from boss to subordinate. Expert Panel®, Forbes, 6 Feb. 2023 Its unidirectional bezel is made with a Carbonium finish containing upcycled fibers from airplane fuselage offcuts, which cuts the environmental impact of other carbon composites used in watchmaking down by about 40 percent, according to the company. Paige Reddinger, Robb Report, 25 May 2023 Like all great sports watches, the 200 Solargraph is water resistant to 200 meters, with a unidirectional bezel to time dives. Robb Report Studio, Robb Report, 15 Feb. 2023 With modeling and experiment, the team is working to get the best spherical compression from its unidirectional driver. Bydaniel Clery, science.org, 15 Feb. 2023 Second, the moral arc of history is not always unidirectional. Razib Khan, Discover Magazine, 29 Jan. 2012 His account suggests a unidirectional process of unsettling that emanates from the artist into the world. Lucie Elven, The New Yorker, 5 Jan. 2023 The round watch featuring unidirectional bezel and blue dial with date window at 4 o’clock and stainless steel case is on sale for just $219.99, more than 40% off its original price. Billboard Staff, Billboard, 21 Nov. 2022 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'unidirectional.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1883, in the meaning defined at sense 1

Time Traveler
The first known use of unidirectional was in 1883

Dictionary Entries Near unidirectional

Cite this Entry

“Unidirectional.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unidirectional. Accessed 21 Sep. 2023.

Medical Definition


uni·​di·​rec·​tion·​al ˌyü-ni-də-ˈrek-shnəl, -dī-, -shən-ᵊl How to pronounce unidirectional (audio)
: involving, functioning, moving, or responsive in a single direction
unidirectionally adverb
Last Updated: - Definition revised
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