/ ˈvʌlgə(r); NAmE / adjective
1.
not having or showing good taste; not polite, elegant or well behaved
SYN coarse , in bad taste :
a vulgar man
vulgar decorations
She found their laughter and noisy games coarse and rather vulgar.
2.
rude and likely to offend
SYN crude :
vulgar jokes
► vul·gar·ly adverb :
He eyed her vulgarly.
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WORD ORIGIN
late Middle English : from Latin vulgaris , from vulgus common people. The original senses were used in ordinary calculations (surviving in vulgar fraction ) and in ordinary use, used by the people (surviving in vulgar tongue ).