Meaning of LENS in English

(GLASS) [noun] [C] - a thin piece of glass, plastic or other transparent material which usually has a curved surface and makes objects seem closer, larger, smaller, etc. Lenses are used in cameras, people's glasses and telescopes.This type of camera has a zoom lens.The lenses of my glasses steamed up in the sudden warmth of the room.Lens is also another word for contact lens. See at contact (TOUCH).

Cambridge English vocab.      Кембриджский английский словарь.