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
n An exciting exhibition, performance or event.
n An embarrassing situation
n (usually|in the plural) 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.
n (figuratively) An aid to the intellectual sight.