From Longman Dictionary of Contemporary Englishsunglassessun‧glass‧es /ˈsʌnˌɡlɑːsɪz $ -ˌɡlæ-/ ●●● S3 noun [plural] 
DCBMDdark glasses that you wear to protect your eyes when the sun is very bright SYN shades
DCBMDdark glasses that you wear to protect your eyes when the sun is very bright SYN shadesExamples from the Corpus
sunglasses• Except for one guy, with a beer and sunglasses, grinning and waving.• Their designer frustrations go well with their expensive sunglasses, but somehow sincerity suffers beneath the hard gloss.• He further obliterates his own identity behind a pair of mirrored sunglasses, whose glassy surface deflects even the most tenacious gaze.• Fleets of sunglasses and smiles greet us.• He now took a pair of sunglasses from his shirt pocket and pointed them at me.• Yet the sneer, the attitude and a handy pair of sunglasses made it clear: The guy is cool.• They have been issued with sunglasses, badges, scarves and ties.• Young Duval manages a somewhat sinister presence on the course in wraparound sunglasses. 