INTENSITY
saturation, chroma, intensity, vividness
(noun) chromatic purity: freedom from dilution with white and hence vivid in hue
volume, loudness, intensity
(noun) the magnitude of sound (usually in a specified direction); “the kids played their music at full volume”
intensity, intensiveness
(noun) high level or degree; the property of being intense
intensity, strength, intensity level
(noun) the amount of energy transmitted (as by acoustic or electromagnetic radiation); “he adjusted the intensity of the sound”; “they measured the station’s signal strength”
Source: WordNet® 3.1
Etymology
Noun
intensity (plural intensities)
The quality of being intense.
The degree of strength.
(physics) Time-averaged energy flux (the ratio of average power to the area through which the power "flows"); irradiance.
(optics) Can mean any of radiant intensity, luminous intensity or irradiance.
(astronomy) synonym of radiance.
(geology) The severity of an earthquake in terms of its effects on the earth's surface, and buildings. The value depends on the distance from the epicentre, and is not to be confused with the magnitude.
Source: Wiktionary
In*ten"si*ty, n. Etym: [LL. intensitas: cf. F. intensité. See
Intense.]
1. The state or quality of being intense; intenseness; extreme
degree; as, intensity of heat, cold, mental application, passion,
etc.
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.
2. (Physics)
Definition: The amount or degree of energy with which a force operates or a
cause acts; effectiveness, as estimated by results produced.
3. (Mech.)
Definition: The magnitude of a distributed force, as pressure, stress,
weight, etc., per unit of surface, or of volume, as the case may be;
as, the measure of the intensity of a total stress of forty pounds
which is distributed uniformly over a surface of four square inches
area is ten pounds per square inch.
4. (Photog.)
Definition: The degree or depth of shade in a picture.
Source: Webster’s Unabridged Dictionary 1913 Edition