- lens [ lenz ] noun count *1. ) a thin piece of curved glass or plastic that makes things seem smaller, bigger, or clearer:eyeglasses with thick lensesa ) a piece of equipment that is part of a camera:a camera with a telescopic lens2. ) the part of the eye behind the PUPIL that bends light to produce an image on the RETINA3. ) a CONTACT LENS:I haven't got my lenses in.
Usage of the words and phrases in modern English. 2013.