[ trahy-ang-gyuh-ler ]
/ traɪˈæŋ gyə lər /


pertaining to or having the form of a triangle; three-cornered.
having a triangle as base or cross section: a triangular prism.
comprising three parts or elements; triple.
pertaining to or involving a group of three, as three persons, parties, or things.

Nearby words

  1. triangle,
  2. triangle inequality,
  3. triangle of auscultation,
  4. triangle of forces,
  5. triangle of safety,
  6. triangular bandage,
  7. triangular bone,
  8. triangular matrix,
  9. triangular muscle,
  10. triangular trade

Origin of triangular

1535–45; < Latin triangulāris, equivalent to triangul(um) triangle + -āris -ar1

Related formstri·an·gu·lar·i·ty [trahy-ang-gyuh-lar-i-tee] /traɪˌæŋ gyəˈlær ɪ ti/, nountri·an·gu·lar·ly, adverbsub·tri·an·gu·lar, adjectivesub·tri·an·gu·lar·i·ty, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for triangular

British Dictionary definitions for triangular


/ (traɪˈæŋɡjʊlə) /


Also: trigonal of, shaped like, or relating to a triangle; having three corners or sides
of or involving three participants, pieces, or units
maths having a base shaped like a triangle
Derived Formstriangularity (traɪˌæŋɡjʊˈlærɪtɪ), nountriangularly, adverb

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for triangular



1540s, from Late Latin triangularis, from triangulum (see triangle).

Online Etymology Dictionary, © 2010 Douglas Harper