[t_ɹ_aɪ__ˈa_n_ɡ_j_ʊ_l_ˈeɪ_ʃ_ə_n], [tɹa͡ɪˈanɡjʊlˈe͡ɪʃən], [tɹaɪˈanɡjʊlˈeɪʃən]
Definitions of triangulation

a trigonometric method of determining the position of a fixed point from the angles to it from two fixed points a known distance apart; useful in navigation

a method of surveying; the area is divided into triangles and the length of one side and its angles with the other two are measured, then the lengths of the other sides can be calculated

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.

Act of triangulating: the series of triangles so used.

Use of a series of triangles in a trigonometrical survey.

The division of a district of country into portions in the form of triangles for the convenience of accurate measurements, as in the trigonometrical survey.
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Usage examples for triangulation

On the 23rd, we ascertained the elevation of the highest peak of the island by triangulation to be three thousand one hundred and twenty six fet. – The Former Philippines thru Foreign Eyes by Tomás de Comyn Fedor Jagor Rudolf Ludwig Carl Virchow Charles Wilkes

" We're working on a triangulation now. – Out Like a Light by Gordon Randall Garrett

On the floor of the western end is the meridian traced by the astronomer Cassini while engaged in the triangulation of France. – The South of FranceEast Half by Charles Bertram Black

After the train had got under way, I asked Mr. Hedges to remain behind and assist me in measuring, by a rude system of triangulation the distance across the lake as well as to the Tetons; but owing to the difficulty we encountered in laying out a base line of sufficient length, we abandoned the scheme after some two hours of useless labor. – The Discovery of Yellowstone Park by Nathaniel Pitt Langford

Portlock about the Irish Triangulation and its calculation. – Autobiography of Sir George Biddell Airy by George Biddell Airy

I knew that great pains had been taken in giving to the principal triangulation a degree of accuracy never before reached, and in fixing the astronomical latitudes of many stations with unequalled precision. – Autobiography of Sir George Biddell Airy by George Biddell Airy

There is a great system of triangulation across the mountains, and every few months our reckonings are verified. – The Princess Passes by Alice Muriel Williamson and Charles Norris Williamson

Having delivered himself of this eulogy, my friend dropped his exhausted cigarette, lit another, and appeared again absorbed in the triangulation of his matrimonial problem. – Mr. Isaacs by F. Marion Crawford

The altitude had been measured by triangulation by the hydrographer of the expedition, but I had other methods of measuring the ascent. – My Attainment of the Pole by Frederick A. Cook

Did they try to get a triangulation – Beyond The Thunder by H. B. Hickey

It is doubtful if this triangulation could have been carried out by Cook during his passage up and then down the river, the only time he had in 1759, but if it were, it argues much greater knowledge of nautical surveying than he is generally supposed to have had at the time. – The Life of Captain James Cook by Arthur Kitson

Having fixed upon a favourable spot for commencing his triangulation behind a promontory which served to conceal them from the view of a native village which they saw at no great distance, Mr. Yule went ashore in the first gig with five seamen and one marine, accompanied by Mr. Sweetman, in the second gig, with three seamen and two marines, all well armed, and proceeded to hoist the Union Jack and take possession of the place in the name of her Majesty Queen Victoria. – The Bushman Life in a New Country by Edward Wilson Landor

Our studies of character, to change the image, are very much like the surveyor's triangulation of a geographical province. – The Complete PG Works of Oliver Wendell Holmes, Sr. by Oliver Wendell Holmes, Sr. (The Physician and Poet not the Jurist)

I hope my readers will easily grasp this simple method of triangulation the result of which indicates to us with absolute certainty the distance of the two great celestial torches to which we owe the radiant light of day and the gentle illumination of our nights. – Astronomy for Amateurs by Camille Flammarion

At the time of his death he was employed in the Baluchistan Survey party in the completion of a triangulation series which should carry the great Indian system to the Kojak range, and furnish a scientific and highly accurate base for future extension into Afghanistan. – Memoir of William Watts McNair by J. E. Howard

Here, we return to our first method, that of triangulation – Astronomy for Amateurs by Camille Flammarion

But the human eye has its own system of triangulation – Angel Island by Inez Haynes Gillmore