sight

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sight:

see visionvision,
physiological sense of sight by which the form, color, size, movements, and distance of objects are perceived. Vision in Humans

The human eye functions somewhat like a camera; that is, it receives and focuses light upon a photosensitive receiver, the retina.
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sight

[sīt]
(navigation)
(ordnance)
Mechanical or optical device for aiming a firearm or for laying a gun or launcher in position.
To aim at a target or aiming point.
(physiology)

sight

i. An optical device for the measurement of drift. See drift indicator.
ii. An aiming device for aiming weapons. It may be a part of a head-up display or a separate unit. It may be fixed, gyro, or electronic. See sight glass (iii).
iii. To make an observation of a heavenly body with a sextant.

sight

1. the power or faculty of seeing; perception by the eyes; vision
2. any of various devices or instruments used to assist the eye in making alignments or directional observations, esp such a device used in aiming a gun
3. an observation or alignment made with such a device
References in classic literature ?
Rows of brown backs paused for a moment and then leapt with a motion as if they were springing over waves out of sight.
Below lay Numa beneath the shade of the lone tree and at the ape-man's call he staggered slowly to his feet, yet weak as he was, he still growled savagely, even essaying a roar at the sight of his enemy.
Presently a strange sight burst upon his astonished vision.
During my youthful days discontent never visited my mind, and if I was ever overcome by ennui, the sight of what is beautiful in nature or the study of what is excellent and sublime in the productions of man could always interest my heart and communicate elasticity to my spirits.
Then she caught sight of the river, bending like a silver bow at the foot of Bellissime.
The foremost man seemed much troubled at the sight, and asked what he could do.
He looked up, startled and frightened at the sight of a stranger in such a place, and to soothe his fears, I at once spoke: "Be not alarmed, sir, whoever you may be.
Marian felt her cheeks glow with pride, at sight of the half-hidden looks of admiration sent forth by the other ladies-in-waiting.
The meanest mathematician in Spaceland will readily believe me when I assert that the problems of life, which present themselves to the well-educated -- when they are themselves in motion, rotating, advancing or retreating, and at the same time attempting to discriminate by the sense of sight between a number of Polygons of high rank moving in different directions, as for example in a ball-room or conversazione -- must be of a nature to task the angularity of the most intellectual, and amply justify the rich endowments of the Learned Professors of Geometry, both Static and Kinetic, in the illustrious University of Wentbridge, where the Science and Art of Sight Recognition are regularly taught to large classes of the ELITE of the States.
As Sola and I entered the plaza a sight met my eyes which filled my whole being with a great surge of mingled hope, fear, exultation, and depression, and yet most dominant was a subtle sense of relief and happiness; for just as we neared the throng of Martians I caught a glimpse of the prisoner from the battle craft who was being roughly dragged into a nearby building by a couple of green Martian females.
Then he would enjoy their consternation at sight of a naked white boy trapped in the war togs of a black warrior and roaming the jungle with only a great ape as his companion.
In another second it had lifted a bar of white aluminium into sight, untarnished as yet, and shining dazzlingly, and deposited it in a growing stack of bars that stood at the side of the pit.