(physics) a stress that produces an elongation of an elastic physical body WordNet 3.0 & Open English WordNet

In physics, tension is described as the pulling force transmitted axially by the means of a string, a rope, chain, or similar object, or by each end of a rod, truss member, or similar three-dimensional object; tension might also be described as the action-reaction pair of forces acting at each end of said elements. Wikipedia

A force related to the stretching of an object Wikipedia Disambiguation

Pulling force transmitted axially – Opposite of compression Wikidata

Force transmitted through a rope, string, cable, or similar object (used with prepositions on, in, or of, e.g., "The tension in the cable is 1000 N", to convey that the same magnitude of force applies to objects attached to both ends). Wiktionary