Sunglass

Noun

noun

1. Singular form of sunglasses; used chiefly in compoundsa sunglass holder
• They trekked through Europe, discovering designers like Melinda Gloss and the Italian sunglass manufacturer LGR, with whom they secured exclusive United States representation.
2. (archaic) A convex lens of glass for producing heat by converging the sun's rays into a focus.Lighting a cigar with a sunglass — Hawthorne.