n.
1.an instance of visual perception
2.anything that is seen
3.the ability to see
4.a optical instrument for aiding the eye in aiming, as on a firearm or surveying instrument
5.a range of mental vision
6.the range of vision
7.the act of looking or seeing or observing
8.(often followed by `of') a large number or amount or extent sight v.
1.catch sight of