Dictionary
triangle
noun tri·an·gle \ˈtrī-ˌaŋ-gəl\
: 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
Full Definition of TRIANGLE
1
: a polygon having three sides — compare spherical triangle
2
a : 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 rod b : 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
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Illustration of TRIANGLE
Origin of TRIANGLE
Middle English, from Anglo-French, from Latin triangulum, from neuter of triangulus triangular, from tri- + angulus angle
First Known Use: 14th century
Rhymes with TRIANGLE
TRIANGLES Defined for Kids
triangle
noun tri·an·gle \ˈtrī-ˌaŋ-gəl\
Definition of TRIANGLE for Kids
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
Medical Dictionary
triangle
noun tri·an·gle \ˈtrī-ˌaŋ-gəl\
Medical Definition of TRIANGLE
: a three-sided region or space and especially an anatomical one—see anterior triangle, posterior triangle, scarpa's triangle, suboccipital triangle, superior carotid triangle
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