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 periodicals archive ?
"Sight Unseen is very well in himself and he must run well if he acts on the course," said trainer Henry Cecil.
TV: Racing UK.ARGUS MERCURY December Draw (nb) 2.15 Star Links Falling Angel 2.50 La Pantera Chock A Block (nap) 3.25 Sight Unseen Kayf Aramis 4.00 Isabelonabicycle Kris Kin Line 4.35 Fleurissimo Miss Tango Hotel 5.10 Visite Royale Sands Crooner 5.45 Spic 'n Span Going: Good.
It's perhaps a leap of faith to indulge so much hard-earned cash, sight unseen, but much more affordable is the pack of six facial treatment masks for pounds 45, which boost moisture in the drying summer months.
Franca, sight unseen, also hired his young wife, Lois Smith.
Nevertheless, when the chance arose, he plunked down US$130,000 to invest in a new chain of cafes, sight unseen, with two partners.
Robert Tinnell and Bo Hampton's SIGHT UNSEEN (1582405964, $19.99) appears in full color and provides the gripping story of a blind neuro-physicist who is seeing dead things.
blocked the broadcast, sight unseen. There was reportedly no similar campaign in Canada.
Douglas's mother decides to move out to the Karoo backwaters of the country, buys a house sight unseen and vanishes into her painting career, leaving Douglas pretty much on his own.
The rapid increase in property values has also attracted speculators who can purchase homes sight unseen and resell them for a profit, sometimes without even making the first loan payment.
YOU DON'T OFTEN HEAR OF PEOPLE BUYING HOUSES sight unseen. So why would you even consider choosing a private school for your child without checking it out first?
It is nigh impossible to assign values sight unseen.