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sunglasses

[suhn-glas-iz, -glah-siz]
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plural noun
  1. eyeglasses with colored or tinted lenses that protect the eyes from the glare of sunlight.

Origin of sunglasses

1800–10; sun + glasses

sunglass1

[suhn-glas, -glahs]
noun
  1. burning glass.

Origin of sunglass1

First recorded in 1800–10; sun + glass
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for sunglasses

sunglasses

pl n
  1. glasses with darkened or polarizing lenses that protect the eyes from the sun's glare

sunglass

noun
  1. a convex lens used to focus the sun's rays and thus produce heat or ignition; burning glass
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for sunglasses

n.

1917, from sun (n.) + glasses. Earlier sunglass (1804) meant a burning glass.

Online Etymology Dictionary, © 2010 Douglas Harper