triangular
adjective
tri·an·gu·lar
trī-ˈaŋ-gyə-lər 
1
a
: of, relating to, or having the form of a triangle
a triangular plot of land
b
: having a triangular base or principal surface
a triangular table
a triangular pyramid
2
a(1)
: of, relating to, or involving three elements
a triangular agreement
(2)
of a military group
: based primarily on three units
b
: of or relating to a love triangle
Examples of triangular in a Sentence
Recent Examples on the Web
Its unusual shape is part boat prow, part clothing iron, thanks to a long, narrow triangular lot that tapers to a point at the southern end.
—
Abby Montanez, Robb Report, 29 Sep. 2025
Cotton On Arden Sling Bag While most belt bags come in a traditional square or rectangular shape, the Cotton On Arden Sling Bag turns the standard on its head with a unique triangular design that’ll add intrigue to every outfit and remain practical for travel.
—Merrell Readman, Travel + Leisure, 27 Sep. 2025
Designed by architect Ed Niles, the triangular 7,100-square-foot house features a flat roof, glass walls, and soaring ceilings lined with dramatic beams.
—Katie Schultz, Architectural Digest, 19 Sep. 2025
Venomous snakes typically have triangular heads and a vertical pupil.
—Kirsten Fiscus, Nashville Tennessean, 17 Sep. 2025
See All Example Sentences for triangular
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Abby Montanez, Robb Report, 29 Sep. 2025
Cotton On Arden Sling Bag While most belt bags come in a traditional square or rectangular shape, the Cotton On Arden Sling Bag turns the standard on its head with a unique triangular design that’ll add intrigue to every outfit and remain practical for travel.
—Merrell Readman, Travel + Leisure, 27 Sep. 2025
Designed by architect Ed Niles, the triangular 7,100-square-foot house features a flat roof, glass walls, and soaring ceilings lined with dramatic beams.
—Katie Schultz, Architectural Digest, 19 Sep. 2025
Venomous snakes typically have triangular heads and a vertical pupil.
—Kirsten Fiscus, Nashville Tennessean, 17 Sep. 2025
See All Example Sentences for triangular
Cite this Entry
“Triangular.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/triangular. Accessed 17 Oct. 2025.
Copy CitationKids Definition
triangular
adjective
tri·an·gu·lar
trī-ˈaŋ-gyə-lər
1
: of, relating to, or having the form of a triangle
2
: having a triangular base or principal surface
a triangular pyramid
Medical Definition
triangular
noun
tri·an·gu·lar
trī-ˈaŋ-gyə-lər
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