In-tĕn'si-ty, n.
n. [L. Lat. intensitas, Fr. intensité, Sp. intensidad, It. intensità. See INTENSE.]
Sense 1. The state of being intense; intenseness; extreme degree; as, intensity of heat, cold, application, or guilt.
If you would deepen the intensity of light, you must be content to bring into deeper blackness and more distinct and definite outline the shade that accompanies it. F. W. Robertson.
Sense 2. (Physics & Mech.) The amount or degree of energy with which a force operates or a cause acts; effectiveness, as estimated by results produced.