trilateral trilarcenous • trilaterality · · · Info · Definitions · Synonyms · Characters · · trilateral · · Text Latin · · Script 10 · · Length 4 · · Syllables Definitions · · · (noun) a three-sided polygon. Synonyms: triangle, trigon. · · Noun Definition 1 (adj) involving three parties. Example: "Trilateral talks." · · Adjective Definition 1 (adj) having three sides. Synonyms: triangular, three-sided. Example: "A trilateral figure." · · Adjective Definition 2 Synonyms · · · triangle · · Synonym 1 trigon · · Synonym 2 triangular · · Synonym 3 three-sided · · Synonym 4 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C r latin small letter r U+0072 t latin small letter t U+0074