trilateral

Noun	1.	trilateral - a three-sided polygon triangle, trigon 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 or elements; "the triangular mother-father-child relationship"; "a trilateral agreement"; "a tripartite treaty"; "a tripartite division"; "a three-way playoff" three-party, three-way, tripartite, triangular many-sided, multilateral - having many parts or sides
	2.	trilateral - having three sides; "a trilateral figure" three-sided, triangular many-sided, multilateral - having many parts or sides

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