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Having or involving three sides, countries, or parties.

[From Latin trilaterus : tri-, tri- + latus, later-, side.]

tri·lat′er·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.


having three sides
triˈlaterally adv
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(traɪˈlæt ər əl)

having three sides.
[1650–60; < Latin trilater(us) three-sided + -al1. See tri-, lateral]
tri•lat′er•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:
Noun1.trilateral - a three-sided polygontrilateral - a three-sided polygon    
polygon, polygonal shape - a closed plane figure bounded by straight sides
acute triangle, acute-angled triangle - a triangle whose interior angles are all acute
equiangular triangle, equilateral triangle - a three-sided regular polygon
isosceles triangle - a triangle with two equal sides
oblique triangle - a triangle that contains no right angle
obtuse triangle, obtuse-angled triangle - a triangle that contains an obtuse interior angle
right triangle, right-angled triangle - a triangle with one right angle
scalene triangle - a triangle with no two sides of equal length
cuneus, wedge, wedge shape - any shape that is triangular in cross section
Adj.1.trilateral - involving three parties; "trilateral talks"
reciprocal, mutual - concerning each of two or more persons or things; especially given or done in return; "reciprocal aid"; "reciprocal trade"; "mutual respect"; "reciprocal privileges at other clubs"
2.trilateral - having three sidestrilateral - having three sides; "a trilateral figure"
many-sided, multilateral - having many parts or sides
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


[ˈtraɪˈlætərəl] ADJtrilátero
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


adjdreiseitig; conference, agreement alsotrilateral
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007


[ˌtraɪˈlætrl] adjtrilaterale
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995
References in periodicals archive ?
The two delegations examined also the situation in Africa, with Amrani recalling that Morocco's action in the continent consists of various multi-sectoral cooperation programmes, both bilaterally and trilaterally.
The U.S., Japan, and South Korea closely coordinate and consult trilaterally on policy toward North Korea, and Japan participates in the Six-Party Talks to end North Korea's nuclear arms ambitions.
In contrast, and I think incorrectly, Anthony de Jasay defines ownership as a simple bilateral relation between an owner and the thing owned, such that the owner is at liberty to use it, to concede specific rights in it to others, and to alienate it, as well as to exclude access to it by others except with his consent." (10) Defined trilaterally, property has two aspects: the object owned, and the network of social relationships that establish the connection between persons and the object.
He said a trilaterally summit meeting between Pakistan and Turkey and Afghanistan is due shortly which will be attended by President Asif Ali Zardari aiming at bringing peace in Afghanistan.
In contrast to this unilateral price representation, the analysis proposed in this article needs a representation for trilaterally coexisting systems of price (P), cost (C) and value (V), as illustrated in Figure 4.
On North Korea, the two are expected to agree on the importance of maintaining firm cooperation bilaterally, as well as trilaterally with the United States, in seeking a quick resumption of the six-party talks that also involve North Korea, China and Russia.
We are going to see each other trilaterally in Tehran," he said.
However detailed, Clarkson's institutional discussion does leave one question unanswered: to what degree was the potential growth of transborder institutions and governance between Canada and the United States restrained by the need to negotiate trilaterally rather than bilaterally?
Laos has met trilaterally on narcotics issues with Vietnam and Cambodia, and participates in an occasional regional consultative group on drug issues under UNODC auspices which brings together officials from those four countries, Burma and China.
Common regional issues that need to be addressed trilaterally include environment and energy technology, disaster prevention, and mitigation technology.
Such issues have not been addressed trilaterally in the past, primarily due to the dramatic differences in standards of living.