sightとは何ですか?The ability to see.The act or fact of seeing: hoping for a sight of land; caught sight of a rare bird. Field of vision.The foreseeable future; prospect: no solution in sight. Mental perception or consideration: We lost sight of the purpose of our visit. Something seen; a view.Something worth seeing; a spectacle: the sights of London. Informal Something unsightly: Your hair is a sight. A device used to assist aim by guiding the eye, as on a firearm or surveying instrument.An aim or observation taken with such a device.An opportunity to observe or inspect.Upper Southern U.S. A large number or quantity: A sight of people were there. To perceive with the eyes; get sight of: sighted land after 40 days at sea. To observe through a sight or an optical instrument: sight a target. To adjust the sights of (a rifle, for example).To take aim with (a firearm).To direct one's gaze; look carefully.To take aim: sighted along the barrel of the gun. on sight Immediately upon being seen: threatened to shoot looters on sight. out of sight Slang Remarkable; incredible: The graduation party was out of sight. sight for sore eyes Informal One whom it is a relief or joy to see.sight unseen Without seeing the object in question: bought the horse sight unseen.