Definitions of trilateral
  1. adjective
    having three sides
    “a trilateral figure”
    synonyms: three-sided, triangular
    many-sided, multilateral
    having many parts or sides
  2. adjective
    involving three parties
    trilateral talks”
    mutual, reciprocal
    concerning each of two or more persons or things; especially given or done in return
  3. noun
    a three-sided polygon
    synonyms: triangle, trigon
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    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
    an object shaped like an equilateral triangle
    type of:
    polygon, polygonal shape
    a closed plane figure bounded by straight sides
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