v. t. [ imp. & p. p. Triangulated p. pr. & vb. n. Triangulating. ] 1. To divide into triangles; specifically, to survey by means of a series of triangles properly laid down and measured. [ 1913 Webster ]

2. To make triangular, or three-cornered. [ 1913 Webster ]

n. [ Cf. F. triangulation. ] (Surv.) The series or network of triangles into which the face of a country, or any portion of it, is divided in a trigonometrical survey; the operation of measuring the elements necessary to determine the triangles into which the country to be surveyed is supposed to be divided, and thus to fix the positions and distances of the several points connected by them. [ 1913 Webster ]