intensity

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Exceptionally great concentration, power, or force.
2. n. Physics The amount or degree of strength of electricity, light, heat, or sound per unit area or volume.
3. n. The strength of a color, especially the degree to which it lacks its complementary color.
4. n. See saturation.

Century Dictionary and Cyclopedia

1. n. The character or state of being intense; the quantity or degree of a quality, action, or effect; degree; specifically, a high degree. Intensity (as opposed to extension) is a quantity which is not apprehended by a successive synthesis, but all at once; a quantity the parts of which are not separately identifiable, and which has an absolute minimum.
2. n. In physics and mech., the amount or degree of energy with which a force operates or a cause acts; effectiveness, as estimated by the result; the magnitude of a force, measured in appropriate units: as, the intensity of gravitation. In electricity, the intensity of a current is properly its strength (expressed in amperes); in popular language, however, it is often used of the electromotive force or potential-difference of the current, as when a voltaic battery, coupled in series, is said to be arranged for intensity.
3. n. Used absolutely: Intense feeling or emotion; also, the exhibition or embodiment of intense feeling or emotion.
4. n. In photography, opacity or density, as of a negative. See intensification, 2.

Wiktionary

1. n. the quality of being intense
2. n. the degree of strength
3. n. physics time-averaged energy flux (the ratio of average power to the area through which the power "flows"); irradiance
4. n. optics can mean any of radiant intensity, luminous intensity or irradiance
5. n. astronomy syn. radiance
6. n. 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.

GNU Webster's 1913

1. n. The state or quality of being intense; intenseness; extreme degree
2. n. (Physics) The amount or degree of energy with which a force operates or a cause acts; effectiveness, as estimated by results produced.
3. n. (Mech.) The magnitude of a distributed force, as pressure, stress, weight, etc., per unit of surface, or of volume, as the case may be.
4. n. (Photog.) The degree or depth of color or shade in a picture.

WordNet 3.0

1. n. chromatic purity: freedom from dilution with white and hence vivid in hue
2. n. the magnitude of sound (usually in a specified direction)
3. n. the amount of energy transmitted (as by acoustic or electromagnetic radiation)
4. n. high level or degree; the property of being intense