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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 ?
On a more speculative basis, the analyst suggested that Iran, which has gained significant inroads into the Iraqi government, may be seeking a "backdoor" into the matrix of trilaterals among Cyprus, Greece, Israel, Jordan and Egypt.
It is possible that Iran, through its access to the Iraqi government, is keen on observing developments within the trilaterals network, said Tziarras.
The foreign minister emphasized also that the network of cooperation being built via the trilaterals is not intended to "militarise" the region.
The matrix of trilateral summits among Mediterranean nations is not directed against Turkey, rather, Ankara with its own actions has made it impossible for itself to be included, foreign minister Nicos Christodoulides said on Thursday.
When it was formed in 1973, the Trilateral Commission's benign-sounding purposes included gathering prominent Western Europeans, North Americans, and Japanese to promote the "enhancement of cooperative relations," "analysis of major issues," and "the development [and] endorsement of proposals on questions of vital mutual interest." Nothing in its initial literature mentioned world government, but this has been the underlying purpose of the Trilateral Commission (TC) from its outset.
From only 187 members at its launching, Trilateral membership in mid-2004 has swelled to 379 bankers, politicians, corporate bigwigs, media heavyweights, labor leaders, academics and even some clergymen.
Henry Kissinger, a member of the executive committee of the Trilateral Commission and a longtime power in the Council on Foreign Relations (CFR), called the NAFTA vote the single most important decision that Congress would make during Mr.