sightsightsightssightedsightingnoun1(no plural) the ability to seesame meaningeyesight: She has poor sight (= she cannot see well).2(no plural) seeing somebody or something: We had our first sight of London from the plane.3(pluralsights) something that you see: The mountains were a beautiful sight.4sights (plural) the interesting places, especially in a town or city, that are often visited by tourists: When you come to Paris I'll show you the sights.5(no plural) a position where you can see somebody or something: We watched until they were out of sight (= we could not see them). Eventually the town came into sight (= we could see it).at first sightwhen you see somebody or something for the first time: He fell in love with her at first sight.catch sight of somebodyor somethingto see somebody or something suddenly: I caught sight of Fiona in the crowd.lose sight of somebodyor somethingto no longer be able to see somebody or something: After an hour at sea we lost sight of land.