Sight
WordNet
noun
(1) The act of looking or seeing or observing
"He tried to get a better view of it"
"His survey of the battlefield was limited"
(2) A optical instrument for aiding the eye in aiming, as on a firearm or surveying instrument
(3) The range of vision
"Out of sight of land"
(4) The ability to see; the visual faculty
(5) An instance of visual perception
"The sight of his wife brought him back to reality"
"The train was an unexpected sight"
(6) A range of mental vision
"In his sight she could do no wrong"
(7) Anything that is seen
"He was a familiar sight on the television"
"They went to Paris to see the sights"
(8) (often followed by `of') a large number or amount or extent
"A batch of letters"
"A deal of trouble"
"A lot of money"
"He made a mint on the stock market"
"It must have cost plenty"
verb
(9) Catch sight of; to perceive with the eyes
"He caught sight of the king's men coming over the ridge"