WordReference Random House Learner's Dictionary of American English © 2015
sight /saɪt/USA pronunciationn. 
  • Physiology[uncountable] the power or ability of seeing;
    vision:suffering from a gradual loss of sight.
  • [countable] the act or fact of seeing; a view or glimpse:a gruesome sight.
  • [uncountable] one's range of vision:Don't let them out of your sight.
  • [countable] something seen or worth seeing; a spectacle:to see all the sights of London.
  • Informal Terms[countable;
    usually singular;
    + ~]
    a person or thing unusual, shocking, or distressing to see:He was quite a sight after the brawl.
  • Slang Terms[countable; singular;
    + ~]
    [Chiefly Dialect.]a great deal:It's a sight better to work than to starve.
  • Surveying, Optics[countable;
    often: plural]
    a viewing device, as on a firearm, for aiding the eye in aiming:The assassin had the target lined up in his sights.

  • v. 
  • [+ object] to glimpse, notice, or observe:to sight a ship to the north.
  • to direct or aim (a firearm or the like) by a sight or sights: [no object]to sight and fire with one quick movement.[+ object]to sight the gun.
  • idiom
    1. Idiomsat first sight, [uncountable] after only one brief glimpse:When they met it was love at first sight.
    2. at sight, [uncountable]
      • immediately upon seeing:to translate the document at sight.
      • on presentation:a check payable at sight.
    3. by a long sight, [uncountable; usually with a negative word or phrase] to a great or extreme degree:You haven't finished this book by a long sight.
    4. Idiomscatch sight of, [+ object] to get a quick view:They caught sight of him racing away in the crowd.
    5. know by sight, [know + object + by + ~] to know or recognize (a person or thing seen previously):I know him by sight, but I've never spoken to him.
    6. lose sight of, [+ object] to fail to keep in mind:Let's not lose sight of our main goal, even though we may disagree on how to get there.
    7. Idiomson sight, [uncountable] immediately upon seeing:The police are ordered to shoot him on sight.
    8. out of sight, [uncountable]
      • beyond one's range of vision:She drove away and slowly faded out of sight.
      • [Informal.]too much; exceedingly high:The price is out of sight.
      • [Slang.](often used as an interjection) fantastic;
        marvelous:The party was out of sight.
    9. Idiomssight for sore eyes, [uncountable] someone or something whose appearance is a reason for gladness:The airplane bringing the food was a sight for sore eyes to the drought victims.
    10. Idiomssight unseen, without previous examination:We bought it sight unseen.

    Collins Concise English Dictionary © HarperCollins Publishers::

    sight /saɪt/ n
    1. the power or faculty of seeing; perception by the eyes; vision
      Related adjective(s): visual
    2. the act or an instance of seeing
    3. the range of vision: within sight of land
    4. range of mental vision; point of view; judgment: in his sight she could do nothing wrong
    5. a glimpse or view (esp in the phrases catch sight of, lose sight of)
    6. anything that is seen
    7. (often plural) anything worth seeing; spectacle: the sights of London
    8. informal anything unpleasant or undesirable to see: his room was a sight!
    9. 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
    10. an observation or alignment made with such a device
    11. a sightinformal a great deal: she's a sight too good for him
    12. a sight for sore eyesa person or thing that one is pleased or relieved to see
    13. at sight, on sightas soon as seen
    14. on presentation: a bill payable at sight
    15. know by sightto be familiar with the appearance of without having personal acquaintance
    16. not by a long sightinformal on no account; not at all
    17. set one's sights onto have (a specified goal) in mind; aim for
    18. sight unseenwithout having seen the object at issue: to buy a car sight unseen
    1. (transitive) to see, view, or glimpse
    2. (transitive) to furnish with a sight or sights
    3. to adjust the sight of
    4. to aim (a firearm) using the sight
    Etymology: Old English sihth; related to Old High German siht; see see1

    ˈsightable adj

    'sight' also found in these entries:

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