
on sight
[Middle English, from Old English sihth, gesiht, something seen.]
noun
Idioms beginning with sight:
sight for sore eyes, a
See also at first blush (sight); at sight; can't stand the sight of; catch sight of; heave into sight; in sight; know by sight; lose sight of; love at first sight; lower one's sights; on sight; out of sight; raise one's sights; second sight; see the sights; set one's sights on; twenty-twenty hindsight.
Definition: ability to perceive with eyes
Antonyms: blindness
n
Definition: horrifying thing
Antonyms: beauty
v
Definition: see
Antonyms: be blind
n. (usually sights) a device on a gun or optical instrument used for assisting a person's precise aim or observation.
v.1. (sighting) take aim by looking through the sights of a gun: she sighted down the barrel.
2. take a detailed visual measurement of something with or as with a sight.
3. adjust the sight of (a firearm or optical instrument).
in or within one's sights visible, especially through the sights of one's gun.
See the Introduction, Abbreviations and Pronunciation for further details.
At first sight, he thought the dog looked mean, but it turned out to be friendly.
Tutor's tip: She wanted to "cite" (refer to material as an authority) the medical dictionary to confirm her definition of "cyte" (a maturing germ cell), but she was not familiar with the "site" (the facility location) and the dictionary was not in "sight" (in the fiel
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1. the act or faculty of vision, involving the eye itself, the visual center in the brain, and the optic nerve and nerve fibers in the brain that connect the two.
2. a thing seen.
The special sense that enables the shape, size, position, and color of objects to be perceived; the sense or faculty of vision.

A sight is a device used to assist aligning or aim weapons, surveying instruments, or other items by eye. Sights can be a simple set or system of markers that have to be aligned together as well as aligned with the target (referred to as an iron sights on firearms).[1] They can also be optical devices that allow the user to see the image of an aligned aiming point in the same focus as the target. These include telescopic sights and reflector (or "reflex") sights. There are also sights that project an aiming point onto the target itself, such as laser sights.
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At its simplest, a sight is typically composed of two components, front and rear aiming pieces that have to be lined up. Sights such as this can be found on many types of devices including weapons, surveying and measuring instruments, and navigational tools.
On weapons, these sights are usually formed by rugged metal parts, giving these sights the name "iron sights",[2] a term relative to other weapon sights in that they are not optical or computing sights.[3] On many types of weapons they are built-in and may be fixed, adjustable, or marked for elevation, windage, target speed, etc.[4] They also are classified in forms of notch (open sight) or aperture (closed sight). These types of sights can take considerable experience and skill in the user who has to hold a proper eye position and simultaneously focus on the rear sight, the front sight, a target at different distances, and align all three planes of focus.[5]
Optical sights use optics that give the user an image of an aligned aiming point or patern (also called a reticle) superimposed at the same focus as the target.[citation needed]
A telescopic sight is an optical telescope equipped with some form of graphic image pattern reticle mounted in an optically appropriate position in the optical system to give an accurate aiming point. Telescopic sights are used on a wide range of devices including guns, Surveying equipment, and even as sights on larger telescopes (called a finderscope).
Another type of optical sight is the reflector (or "reflex") sight, a generally non-magnifying optical device that allows the user to look through a glass element and see a reflection of an illuminated aiming point or some other image superimposed on the field of view.[6] These sights have been around for over 100 years and been used on all types of weapons and devices.
Reflector sights were first used as a weapon sight in German aircraft towards the end of World War I. Over the years they became more sophisticated, adding lead computing gyroscopes and electronics (the World War II Gyro gunsight)[7] radar range finding and other flight information in the 1950s and 60s, eventually becoming the modern head-up display.
There are many types of sighting devices. They can be fixed, mechanical, optical, computational, or a mixture of all of these attributes.
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Dansk (Danish)
n. - syn, skue, seværdighed, synsevne
v. tr. - få øje på, tage observationer af, sigte på, rette ind
v. intr. - sigte
idioms:
Nederlands (Dutch)
gezicht, het zien, bezienswaardigheid, vizier, aanblik, uitzicht, in het vizier krijgen, waarnemen iemand van gezicht kennen
Français (French)
n. - vue, vision, spectacle, porcherie (un endroit), personne pas présentable
v. tr. - apercevoir, viser, régler (le viseur d'un fusil)
v. intr. - apercevoir
idioms:
Deutsch (German)
n. - Sehvermögen, Sicht, Sehenswürdigkeit, Visier, Anblick
v. - sichten, mit einem Visier ausstatten, zielen auf
idioms:
Ελληνική (Greek)
n. - όραση, θέα, όψη, θέαμα, άποψη, όραμα, αξιοθέατο, στόχαστρο, οπτικό πεδίο, ματιά, βλέμμα, επιθεώρηση, εξέταση, (καθομ.) μεγάλη ποσότητα ή αριθμός, οικτρό θέαμα, (πληθ.) στόχαστρο ή σκοπευτική διόπτρα, (καθομ.) μάτια
v. - βλέπω, εντοπίζω (οπτικά), διακρίνω, σημαδεύω, σκοπεύω, εφοδιάζω με στόχαστρο, ρυθμίζω στόχαστρο
idioms:
Italiano (Italian)
vista, spettacolo, mirino
idioms:
Português (Portuguese)
n. - visão (f), paisagens (f pl), cena (f), perspicácia (f), pontaria (f), opinião (f), atrações (f) turísticas
v. - avistar
idioms:
Русский (Russian)
зрение, вид, взгляд, точка зрения, предел видимости, прекрасное зрелище, достопримеча- тельности, смехотворное или неприглядное зрелище, уйма, прицельное приспособление, смотровой, оплачиваемый по предъявлению, сделанный без подготовки, увидеть, обнаружить, наблюдать, прицеливаться
idioms:
Español (Spanish)
n. - vista, visión, atracción, objeto de interés, mira, alza, espectáculo
v. tr. - ver, mirar, observar, avistar, vislumbrar, alcanzar con la vista, poner mira, apuntar
v. intr. - espectáculo, ver, mirar, observar
idioms:
Svenska (Swedish)
n. - syn, synförmåga, åsyn, anblick, synhåll, sikte, siktinrättning
v. - sikta, få i sikte, få syn på, observera
中文(简体)(Chinese (Simplified))
景观, 眼界, 视力, 看见, 瞄准, 观看
idioms:
中文(繁體)(Chinese (Traditional))
n. - 景觀, 眼界, 視力
v. tr. - 看見, 瞄準
v. intr. - 瞄準, 觀看
idioms:
한국어 (Korean)
n. - 일람, 조망, (총의) 겨냥
v. tr. - ~을 발견하다, 관측하다, 조준하다
v. intr. - 겨냥하다, 어떤 방향을 잘 보다, 조준하다
idioms:
日本語 (Japanese)
n. - 視力, 見ること, 光景, 視界, 見もの, 名所, 照準, ずっと
v. - 見付ける, 観測する, 照準を合わせる
idioms:
العربيه (Arabic)
(الاسم) مشهد, شيء غريب أو مثير للسخريه (فعل) يرى أو يشاهد, يسدد أو يصوب يعرفه للوهله ألأولى
עברית (Hebrew)
n. - ראייה, מחזה, נוף, טווח-ראייה, נקודת-ראות, כיוון, כוונת, מראה מגוחך, אתר-תיירות, מקום סיור, מבט, חוות-דעת
v. tr. - ראה, צפה
v. intr. - כוונן, התקין כוונת