Also found in: Thesaurus, Acronyms, Encyclopedia.
Related to unidirectional: unidirectional antenna


 (yo͞o′nĭ-dĭ-rĕk′shə-nəl, -dī-)
Moving or operating in one direction only: a unidirectional microphone.

u′ni·di·rec′tion·al′i·ty (-năl′ĭ-tē) n.
u′ni·di·rec′tion·al·ly adv.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(ˌjuːnɪdɪˈrɛkʃənəl; -daɪ-)
having, moving in, or operating in only one direction
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌyu nɪ dɪˈrɛk ʃə nl, -daɪ-)

operating or moving in one direction only.
u`ni•di•rec′tion•al•ly, adv.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.unidirectional - operating or moving or allowing movement in one direction only; "a unidirectional flow"; "a unidirectional antenna"; "a unidirectional approach to a problem"
bidirectional - reactive or functioning or allowing movement in two usually opposite directions
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


[ˌjuːnɪdɪˈrekʃənl] ADJunidireccional
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005


[ˌjuːnɪdɪˈrɛkʃənl] adjunidirezionale
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995
References in periodicals archive ?
Besides, it is proposed to continue with flexi-fare in 101 trains in which average unidirectional monthly occupancy is more than 75 per cent throughout the year.
Since the air is supplied at relatively low velocities (25 to 35 fpm, 0.13 to 0.18 m/s) and only through a part of the ceiling, the unidirectional flow can be maintained mostly in the core of the air jet; whereas, in the other regions of the room recirculating airflow patterns are formed, including at the periphery of the supply air jet (Khankari 2017a, Khankari 2017b).
The new projects to open within the next few days include Arch Roundabout Alternative Interchange with underpass the include a bi-directional three-lane underpass, Al Gassar Interchange featuring a bi-directional two-lane flyover with two separate structures, two unidirectional tunnels connecting West Bay to Unaiza Street and the Pearl to Katara and hotels around.
It shows non-unidirectional flow patterns in the cleanroom and almost unidirectional flow patterns in the minienvironment chamber.
They can then safeguard the network using Waterfall's Unidirectional CloudConnect for reliable and secure IT/OT integration.
Deploying this solution, together with Waterfall's Unidirectional Gateway, augmented our protection by eliminating threats of remote cyberattacks from entering our SCADA system, and potentially causing serious damage to the electric grid.
Young's modulus per material density of CFRP is much higher than that of metals; for example, the specific tensile modulus of steel is about 26 GPa/(g/[cm.sup.3]), while for unidirectional CFRP (UD-CFRP) values > 100 GPa/(g/[cm.sup.3]) can be easily achieved in fiber direction.
Bidirectional SVGA is similar to unidirectional SVGA, and the difference is that bidirectional SVGA is performed in parallel from both directions.
They are are available in both bidirectional and a unidirectional design with an adjustable fixation loop.
"Two big challenges with non-contact safety switches on removable guards are the mounting requirements and their susceptibility to tampering," explains SICK's UK safety specialist and FS engineer Dr Martin Kidman, "The SICK STR1 is highly resistant to tampering whether through accidental damage or deliberate attempts to manipulate or 'defeat' a switch for operational convenience, by offering a choice of universal, unique or permanent coding options and unidirectional mounting screws".
The time and depth contour maps represent a half graben structure representing unidirectional force in the area.
By installing Waterfall's Unidirectional Security Gateways, LogiLube claims that its customers benefit from real-time, actionable and predictive analytics with unprecedented protection from cyber risks because of Internet and cloud connections.

Full browser ?