Cambridge Advanced Learner's Dictionary - 4th Edition
sunglasses / ˈsʌŋˌɡlɑː.sɪz / / ˈsʌnˌɡlæs.ɪz / noun [ plural ] ( also ˌ dark ˈ glasses , informal shades )
A2 dark glasses that you wear to protect your eyes from bright light from the sun:
a pair of sunglasses
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