1 Monica (given name) 2  Monica (singer), R&B singer. 3  Monica (actress), an Indian film actress.  Saint Monica, mother of Augustine.
Definition of triangulation for English Language Learners. : a method of finding a distance or location by measuring the distance between two points whose exact location is known and then measuring the angles between each point and a third unknown point.
(ËtrÉªg ÉËnÉm Éª tri) n. the branch of mathematics that deals with the relations between the sides and angles of plane or spherical triangles, and the calculations based on them. [1605â15; < New Latin trigÅnometria; see trigon, -o-, -metry] trig`oâ¢noâ¢metâ²ric (-nÉËmÉ trÉªk) trig`oâ¢noâ¢metâ²riâ¢cal, adj. trig`oâ¢noâ¢metâ²riâ¢calâ¢ly, adv.