sights (Noun) — An optical instrument for aiding the eye in aiming, as on a firearm or surveying instrument.
sights (Noun) — The things worth seeing in a particular place, esp. tourist attractions.
sights (Noun) — An instance of visual perception. ex. "the sight of his wife brought him back to reality" ex. "the train was an unexpected sight"
sights (Noun) — Anything that is seen. ex. "he was a familiar sight on the television" ex. "they went to Paris to see the sights"
sights (Noun) — The ability to see; the visual faculty.
sights (Noun) — A range of mental vision. ex. "in his sight she could do no wrong"
sights (Noun) — The range of vision. ex. "out of sight of land"
sights (Noun) — The act of looking, seeing or observing. ex. "he tried to get a better sight of it"
sights (Noun) — (often followed by 'of') a large number, amount or extent. ex. "a sight of letters"
sights (Verb) — Catch sight of; to perceive with the eyes. ex. "he caught sight of the king's men coming over the ridge"
sights (Verb) — Take aim by looking through the sights of a gun (or other device).