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 ?
We catch sight of Fadmoor away on our left, with Bilsdale Mast further away, and our route then swings to the right past Cockpit Hall on the left.
If you happen to be watching the World Series By Renault racing on TV from the Nurburgring this weekend, you might catch sight of the new 250 on its debut.
Walking ahead, we soon catch sight of properties in Welburn and our route runs through to the public road.
Did he stop plotting to destroy the world for a second, catch sight of himself in the mirror and think: "Blimey, I've really let myself go, I look sooo old!"
They are much harder to spot, so count yourself lucky if you manage to catch sight of one.
that they did not so much as catch sight of the real problems of morality'.
Stargazers flock to Orkney to catch sight of the first eclipse of its type for 80 years and what happens?
But if you catch sight of them marching round Dyffryn Gardens, your eyes won't be deceiving you.
Only on passing into the central courtyard do visitors catch sight of the monumental structures that have risen within.
You're walking down the street when you catch sight of a billboard ad.
SCOTTISH football fans should stay tuned to the latest pictures from the Phoenix probe on Mars to see if we catch sight of any of the following: The ball booted out of Parkhead by Peter van Vossen.