uni·​di·​rec·​tion·​al | \ ˌyü-ni-də-ˈrek-shnəl, -dī-, -shə-nᵊl How to pronounce unidirectional (audio) \

Definition of unidirectional

1 : involving, functioning, moving, or responsive in a single direction a unidirectional microphone
2 : not subject to change or reversal of direction

Other Words from unidirectional

unidirectionally adverb

Examples of unidirectional in a Sentence

Recent Examples on the Web The Hope’s ceramic unidirectional rotating bezel is in a differing shade of rose. Nancy Olson, Forbes, 25 Oct. 2021 This popular dive watch is considered a solid choice on a variety of fronts—for those seeking sports attributes like a unidirectional bezel, a highly legible dial and enhanced water resistance. Nancy Olson, Forbes, 24 Sep. 2021 This alone is a huge improvement over the choppy, unidirectional quality of a standard video call. Lila Maclellan, Quartz, 30 Aug. 2021 Large amounts of the data have been recorded on unidirectional, multi-lane highways, where the most important tasks are staying in the car’s own lane and not getting too close to the vehicle ahead. Peter Hancock, Scientific American, 16 Aug. 2021 But even in his theory, unidirectional time is unique. Quanta Magazine, 2 Aug. 2021 From a distance, concerts are unidirectional, from the stage outward. New York Times, 16 July 2021 Harry’s love is selfless, absolutely unidirectional, in a way that a partnership between two people who are trying to remodel their vacation house and also raise three children together simply cannot be. Kristen Roupenian, The New Yorker, 5 Aug. 2021 The black unidirectional dive bezel is indexed to the common 20-minute mark for divers, but the rest of the gauge sports a set of concentric etched circles for a sleek, modern take on an otherwise utilitarian watch feature. Mike Espindle, Forbes, 17 June 2021

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

See More

First Known Use of unidirectional

1883, in the meaning defined at sense 1

Buying Guide

Our team at The Usage has selected the best computer microphones.

Learn More About unidirectional

Time Traveler for unidirectional

Time Traveler

The first known use of unidirectional was in 1883

See more words from the same year

Dictionary Entries Near unidirectional



unidirectional current

See More Nearby Entries 

Statistics for unidirectional

Last Updated

13 Dec 2021

Cite this Entry

“Unidirectional.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unidirectional. Accessed 24 Jan. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More Definitions for unidirectional


uni·​di·​rec·​tion·​al | \ ˌyü-ni-də-ˈrek-shnəl, -dī-, -shən-ᵊl How to pronounce unidirectional (audio) \

Medical Definition of unidirectional

: involving, functioning, moving, or responsive in a single direction

Other Words from unidirectional

unidirectionally \ -​ē How to pronounce unidirectional (audio) \ adverb


Test Your Vocabulary

Difficult Spelling Words Quiz

  • alphabet pasta spelling help
  • Which is the correct spelling?
True or False

Test your knowledge - and maybe learn something along the way.

Universal Daily Crossword

A daily challenge for crossword fanatics.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!