eyeglass Syllabification: (eye·glass)Pronunciation: /ˈīˌglas/Translate eyeglass | into Italian Definition of eyeglass noun a single lens for correcting or assisting defective eyesight, especially a monocle. (eyeglasses) North Americananother term for glasses. another term for eyepiece.eyeglass in other Oxford dictionaries Definition of eyeglass in the British & World English dictionary