Merriam-Webster Collegiate Dictionary - vulgar

 adjective  Etymology: Middle English, from Latin ~is of the mob, ~, from volgus, vulgus mob, common people  Date: 14th century  1.  a. generally used, applied, or accepted  b. understood in or having the ordinary sense they reject the ~ conception of miracle — W. R. Inge  2. vernacular the ~ name of a plant  3.  a. of or relating to the common people ; plebeian  b. generally current ; public the ~ opinion of that time  c. of the usual, typical, or ordinary kind  4.  a. lacking in cultivation, perception, or taste ; coarse  b. morally crude, undeveloped, or unregenerate ; gross  c. ostentatious or excessive in expenditure or display ; pretentious  5.  a. offensive in language ; earthy  b. lewdly or profanely indecent  Synonyms: see common, coarse  • ~ly adverb