1 a of or characteristic of the common people, plebeian. b coarse in manners; low (vulgar expressions; vulgar tastes).
2 in common use; generally prevalent (vulgar errors).
Phrases and idioms:
vulgar fraction a fraction expressed by numerator and denominator, not decimally. vulgar Latin informal Latin of classical times. the vulgar tongue the national or vernacular language, esp. formerly as opposed to Latin.
Derivatives:
vulgarly adv.
Etymology: ME f. L vulgaris f. vulgus common people
Useful english dictionary. 2012.