bi·​di·​rec·​tion·​al | \ ˌbī-də-ˈrek-shnəl How to pronounce bidirectional (audio) , -dī-, -shə-nᵊl \

Definition of bidirectional

: involving, moving, or taking place in two usually opposite directions bidirectional flow bidirectional replication of DNA

Other Words from bidirectional

bidirectionally adverb

Examples of bidirectional in a Sentence

Recent Examples on the Web Plans call for a VRE expansion that would introduce weekend, bidirectional and nonpeak hour service before the end of the decade. Laura Vozzella, Washington Post, 24 May 2022 Today, the electric grid is being transformed into a dynamic, bidirectional electric superhighway where electrons flow from a wide variety of power sources to homes and businesses and back again. Christine Boles, Forbes, 26 Apr. 2022 Neural interfaces can also create bidirectional pathways of communication between brain and machine. New York Times, 12 May 2022 Similarly, human types of E. coli may follow a similar cycle of bidirectional transmission between pets and their owners. Quanta Magazine, 27 Apr. 2022 Results were mixed on whether the higher cost of bidirectional charging hardware compared to standard equipment or the additional battery degradation was worth it for the owners and operators of the buses, Mr. Sudhakara says. Jennifer Hiller, WSJ, 5 Mar. 2022 Five years in the making, the new movement also has bidirectional winding and a balance wheel fit with inertia blocks to avoid unnecessary friction. Rachel Cormack, Robb Report, 11 Apr. 2022 The Penn Line, which runs from Baltimore to D.C., is the only one of the system’s three lines that runs bidirectional and on weekends. Washington Post, 10 Apr. 2022 Social media has created an always-on, bidirectional way for customers and brands to engage with one another. Henrietta Akpata, Forbes, 27 Jan. 2022 See More

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

First Known Use of bidirectional

1889, in the meaning defined above

Learn More About bidirectional

Time Traveler for bidirectional

Time Traveler

The first known use of bidirectional was in 1889

See more words from the same year

Dictionary Entries Near bidirectional

biding place


bid off

See More Nearby Entries 

Statistics for bidirectional

Last Updated

29 May 2022

Cite this Entry

“Bidirectional.” Dictionary, Merriam-Webster, Accessed 25 Jun. 2022.

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

More Definitions for bidirectional


bi·​di·​rec·​tion·​al | \ ˌbī-də-ˈrek-shnəl, -dī-, -shən-ᵊl How to pronounce bidirectional (audio) \

Medical Definition of bidirectional

: involving, moving, or taking place in two usually opposite directions bidirectional flow of materials in axons bidirectional replication of DNA

Other Words from bidirectional

bidirectionally \ -​ē How to pronounce bidirectional (audio) \ adverb

More from Merriam-Webster on bidirectional

Nglish: Translation of bidirectional for Spanish Speakers


Test Your Vocabulary

Which Word Does Not Belong?

  • one green toy robot amidst many red toy robots
  • Which of these words does not mean "nonsense"?
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!