To divide into triangles; specifically, to survey by means of a series of triangles properly laid down and measured.

divide into triangles or give a triangular form to; "triangulate the piece of cardboard"

survey by triangulation; "The land surveyor worked by triangulating the plot"

v. determine what hotel/hostel you want to stay at based on its proximity to the city center, restaurants, attractions, and/or easyEverything Internet cafe. Example: It's often difficult to triangulate where to stay using Internet hotel booking sites, whereas Let's Go and Lonely Planet show nearby restaurants and sights.

To make triangular, or three-cornered.

A method of estimating the probable Ancestral Haplotype by using the haplotypes of at least three (thus "triangulate") known lineal descendants.

measure by using trigonometry; "triangulate the angle"