Trianglecommon nounproper nounSyllable DecompositiontriangleEtymologyexpandfrom triangle.Definition1. Constellation of the northern sky, bordered by Andromeda, Pisces, Aries, and Perseus. The symbol: Tri.astronomieexpandTranslationsgerman:Dreieckenglish:Trianglechinese:三角座korean:삼각형자리japanese:さんかく座polish:Trójkątrussian:Треугольникturkish:Üçgen