shadow


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shadow

1. the dark portions of a picture
2. Med a dark area on an X-ray film representing an opaque structure or part
3. (in Jungian psychology) the archetype that represents man's animal ancestors
4. Brit designating a member or members of the main opposition party in Parliament who would hold ministerial office if their party were in power

Shadow

A region of darkness caused by the presence of an opaque object interposed between such a region and a source of light. A shadow can be totally dark only in that part called the umbra, in which all parts of the source are screened off. With a point source, the entire shadow consists of an umbra, since there can be no region in which only part of the source is eclipsed. If the source has an appreciable extent, however, there exists a transition surrounding the umbra, called the penumbra, which is illuminated by only part of the source. Depending on what fraction of the source is exposed, the illumination in the penumbra varies from zero at the edge of the full shadow to the maximum where the entire source is exposed. The edge of the umbra is not perfectly sharp, even with an ideal point source, because of the wave character of light. See Diffraction

What does it mean when you dream about a shadow?

A shadow may represent the hidden aspects of the self. The dreamer often does not accept these parts of his or her personality and they are projected upon others until the dreamer can accept them and incorporate them into his or her psyche.


What does it mean when you dream about a shadow?

In psychology, the shadow refers to the personality traits and tendencies that one has rejected in developing one’s self-image. One of the most influential formulations of the shadow was put forward by the famous Swiss psychiatrist Carl Jung. In Jung’s personality theory, the ego represents the individual’s sense of personal self. This sense of personal identity is purchased at the expense of certain tendencies (e.g., socially undesirable traits), however, which are rejected as “not-self.” According to Jung, these rejected traits come together as a kind of unconscious “counterego” that he termed the shadow.

Although suppressed from conscious awareness, the shadow continues to influence our behavior in powerful ways. In particular, we may become unduly anxious or irritated when in an environment or around a person that in some way reminds us of repressed aspects of our self. If a person has rejected his or her own sexual drive, for example, that person may feel irrational fear or anger around an overtly sexual individual. The shadow may appear as a person in one’s dreams, usually as an individual of the same sex. In Jungian therapy, the shadow is viewed as a potential source of characteristics to be integrated into the subject’s ego structure.

shadow

[′shad·ō]
(optics)
A region of darkness caused by the presence of an opaque object interposed between such a region and a source of light.
(physics)
A region which some type of radiation, such as sound or x-rays, does not reach because of the presence of an object, which the radiation cannot penetrate, interposed between the region and the source of radiation.

SHADOW

(language)
A syntax-directed compiler written by Barnett and Futrelle in 1962. It was the predecessor to SNOBOL(?)

[Sammet 1969, p. 448, 605].
References in classic literature ?
And always two long black shadows flitted before us or followed after, dark spots on the ruddy grass.
The sisters shuddered and clung closer to each other, while Heyward instinctively laid his hand on one of the pistols he had just drawn from their holsters, as he placed himself between his charge and those dense shadows that seemed to draw an impenetrable veil before the bosom of the forest.
The two mysterious shadows retreated again to the tree, and were lost in its deeper shadow.
Yet even when his eyes were opened on the mist and rain, on the moving patch of light from the lamps, and the hedge at the roadside retreating by jerks, the night shadows outside the coach would fall into the train of the night shadows within.
Masilo heard, and said that it should be so, though the way was far, and he feared greatly to appear before him who was called the Slaughterer, and who sat twenty days' journey to the north, beneath the shadow of the Witch Mountain.
I stole round by the eastern end, keeping close in shadow, and at a convenient place, where the darkness was thickest, crossed the palisade.
One chieftain alone had hesitated before departing; I saw him standing in the shadows of a mighty column, his fingers nervously toying with the hilt of his great-sword and his cruel eyes bent in implacable hatred upon Tal Hajus.
There was an emerald flash in his eyes as he glanced at me from the shadow of the trees, a half-luminous colour that vanished as he turned his head again.
The rough floor was spread with deep green moss, and over wall and roof grew flowery vines, filling the air with their sweet breath; while above played the clear, soft light, casting rosy shadows on the glittering drops that lay among the fragrant leaves; and beneath the vines stood Violet, casting crumbs to the downy little moles who ran fearlessly about and listened as she sang to them.
And she ran to the wall and tried to catch hold of the flickering shadow; for, to children of five years old, a shadow seems almost as real as a substance.
He, too, is no more than a shadow, but I seem to hear his words spoken on the moonlit deck of the old Duke - :
I fancied that each shadow, as the sun descended lower and lower, separated itself sullenly from the trunk that gave it birth, and thus became absorbed by the stream; while other shadows issued momently from the trees, taking the place of their predecessors thus entombed.