(n) spectacles that are darkened or polarized to protect the eyes from the glare of the sun, Syn. dark glasses, shades, Example:he was wearing a pair of mirrored shades
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
n.; pl.Sunglasses A convex lens of glass for producing heat by converging the sun's rays into a focus. “Lighting a cigar with a sunglass.” Hawthorne. [ 1913 Webster ]