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[adjective trahy-ang-gyuh-lit, -leyt; verb trahy-ang-gyuh-leyt] /adjective traɪˈæŋ gyə lɪt, -ˌleɪt; verb traɪˈæŋ gyəˌleɪt/
composed of or marked with triangles.
verb (used with object), triangulated, triangulating.
to make triangular.
to divide into triangles.
to survey (an area) by triangulation.
Origin of triangulate
1600-10; < Medieval Latin triangulātus, past participle of triangulāre to make triangles. See triangle, -ate1
Related forms
triangulator, noun
subtriangulate, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for triangulate
Contemporary Examples
Historical Examples
  • A triangulate is a rectilineall figure compounded of triangles.

    The Way To Geometry Peter Ramus
  • The sides of a triangulate are two more than are the triangles of which it is made.

    The Way To Geometry Peter Ramus
  • But in a triangulate the matter is to be prooved by demonstration.

    The Way To Geometry Peter Ramus
  • Therefore by a triangle there may be inscribed a triangulate of 6.

    The Way To Geometry Peter Ramus
  • If I had a transit, I could calculate the depth at any point where the water shows––triangulate with a vertical angle.

    Out of the Depths

    Robert Ames Bennet
  • “You could triangulate at the first place where the bottom can be seen, beyond here,” suggested Genevieve.

    Out of the Depths

    Robert Ames Bennet
  • And thus much of the geodesy of right lines, by the meanes of rectangled triangles: It followeth now of the triangulate.

    The Way To Geometry Peter Ramus
British Dictionary definitions for triangulate


verb (transitive) (traɪˈæŋɡjʊˌleɪt)
  1. to survey by the method of triangulation
  2. to calculate trigonometrically
to divide into triangles
to make triangular
adjective (traɪˈæŋɡjʊlɪt; -ˌleɪt)
marked with or composed of triangles
Derived Forms
triangulately, 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
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Word Origin and History for triangulate

1833, originally in surveying," from Latin triangulum (see triangle) + -ate (2). Related: Triangulated; triangulating. Figurative use by 1860.

Online Etymology Dictionary, © 2010 Douglas Harper
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