Available Definitions:
1) n. - Something exhibited to view; usually, something presented to view as extraordinary, or as unusual and worthy of special notice; a remarkable or noteworthy sight; a show; a pageant; a gazingstock.
2) n. - A spy-glass; a looking-glass.
3) n. - An optical instrument consisting of two lenses set in a light frame, and worn to assist sight, to obviate some defect in the organs of vision, or to shield the eyes from bright light.
4) n. - Fig.: An aid to the intellectual sight.