1 involving three parties or elements; "the triangular mother-father-child relationship"; "a trilateral agreement"; "a tripartite treaty"; "a tripartite division"; "a three-way playoff" [syn: triangular, tripartite, three-party, three-way]
2 having three sides; "a trilateral figure" [syn: triangular, three-sided] n : a three-sided polygon [syn: triangle, trigon]
Etymologytri- + lateral
- Having three sides.
- The trilateral peace conference, between the red faction, blue faction and white faction, went no where.
bifacial, bilateral, cuneate, cuneated, cuneiform, deltoid, dihedral, flanked, handed, lateral, many-sided, multilateral, one-sided, oxygonal, polyhedral, quadrilateral, sided, tetrahedral, three-cornered, three-dimensional, three-footed, three-pronged, three-sided, triangular, triangulate, triarch, trichotomous, tricorn, tricornered, tricuspid, trident, tridental, trifid, triflorate, triflorous, trifurcate, trigonal, trigonoid, trigrammatic, trihedral, trimerous, triparted, tripartite, tripodic, triquetral, triquetrous, trisected, two-sided, unilateral