Definition of triangle
1 : a polygon having three sides — compare spherical triangle
2a : a percussion instrument consisting of a rod of steel bent into the form of a triangle open at one angle and sounded by striking with a small metal rodb : a drafting instrument consisting of a thin flat right-angled triangle of wood or plastic with acute angles of 45 degrees or of 30 degrees and 60 degrees
3 : a situation in which one member of a couple is involved in a love affair with a third person
Examples of triangle in a Sentence
She cut the sandwiches into triangles.
Recent Examples of triangle from the Web
Drizzle the watermelon triangles with olive oil and season with salt and pepper.
Noyes Storybook Parade Children and adults are encouraged to bring a musical instrument, such as drums, triangles or cymbals, and dress as a favorite storybook character to march in the parade.
And some uloborids—the triangle spiders—spin triangular bungee webs.
Their duties include meticulously folding the U.S. flag that’s draped over the casket into a final triangle and presenting it to the next of kin.
Geographically, Richland, Hammonton, and Absecon don't form an isosceles triangle.
Classic trousers in a summer-ready Nantucket red make for an unexpected pairing with a classic triangle bikini—finished with giant hoops.
The range includes triangle and bandeau bikinis rendered in bold, colorful prints and also beaded designs.
Soon a dozen or more notes are bouncing, each with its own rhythm, and they are transformed into numbers, then linked by lines into strange, shifting triangles.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'triangle'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of triangle
Middle English, from Anglo-French, from Latin triangulum, from neuter of triangulus triangular, from tri- + angulus angle
First Known Use: 14th centurySee Words from the same year
TRIANGLE Defined for English Language Learners
Definition of triangle for English Language Learners
: a shape that is made up of three lines and three angles
: something that is shaped like a triangle
: a musical instrument that is made of a steel rod bent into the shape of a triangle and that you play by hitting with a metal rod
TRIANGLE Defined for Kids
Definition of triangle for Students
1 : a flat geometric figure that has three sides and three angles
2 : something that has three sides and three angles a triangle of land
3 : a musical instrument made of a steel rod bent in the shape of a triangle with one open angle
Seen and Heard
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