tensor Syllabification: (ten·sor)Pronunciation: /ˈtensər, ˈtenˌsôr/Definition of tensor noun 1 Mathematics a mathematical object analogous to but more general than a vector, represented by an array of components that are functions of the coordinates of a space. 2 Anatomy a muscle that tightens or stretches a part of the body. Derivatives tensorialPronunciation: /tenˈsôrēəl/ adjective Origin: early 18th century: modern Latin, from Latin tendere 'to stretch'tensor in other Oxford dictionaries Definition of tensor in the British & World English dictionary