[ 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.


Can You Ace This Quiz About “Compliment” vs. “Complement”?
Take this quiz to see if you really know the difference between “compliment” and “complement"!
Question 1 of 11
“Compliment” and “complement” had a shared meaning a long time ago, but today they are no longer interchangeable.

Origin of triangular

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


tri·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. 2020

Example sentences from the Web for triangularity

  • We note the shape which approximates to triangularity, and we note that in color it is said to have been golden yellow.

  • Beauty certainly does have some power; is it so also with triangularity?

    Plotinos: Complete Works, v. 3|Plotinos (Plotinus)

British Dictionary definitions for triangularity

/ (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 forms of triangular

triangularity (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