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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The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/

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)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

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.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved

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
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
Yet, as I descended the steps from the Old Town, I caught sight of a mural towering above the creeping ivy, shrubbery and graffiti covered wall.
If I had not caught sight of the sign, I might never have been there at all.
In 1969 Newcastle University student Steve Row-den was at the University Rag Float Procession when he caught sight of wife-to-be Monica, who was dressed as a stone age maiden.
A HUGE wobble of excitement must have passed through the nation's obese when they caught sight of the news that a new pounds 1 a day slimming pill will be available over the counter within a few months.
Hot, sweaty and stressed by my growing list of people-to-buy-for I caught sight of my better half and son leaning against a candle display and both wearing exactly the same expression: one of unutterable boredom.
Just before dusk I caught sight of a 10-point 70 yards out!
As soon as the burglars caught sight of the gun, they gave up the fight and waited for the police.
Vet Clare Hinchliffe said: "Bobby probably caught sight of the shiny needle and his curious nature got the better of him."
Researchers finally caught sight of the companion using images collected by the Hubble Space Telescope.
The train of thought was instigated by watching Walthamstow on Thursday where I caught sight of two greyhounds that could sit happily in any list.
She went on to say that when she caught sight of the small plastic, non-precious stone that I was so grateful to have back, she absolutely knew that some special boy must have given me the bead.
After viewing all of the hot rods, he caught sight of a sweet, champagne-colored 2000 Lincoln Navigator with leather seats, a built-in TV, and a six-CD changer.