sunglass Meaning, Definition & Usage

  1. noun a convex lens that focuses the rays of the sun; used to start a fire

WordNet


Sun"glass` noun
Wordforms
plural Sunglasses
Definitions
  1. A convex lens of glass for producing heat by converging the sun's rays into a focus. "Lighting a cigar with a sunglass." Hawthorne.

Webster 1913