What is the meaning of vulgar?

adjective

• Lacking refinement or cultivation or taste.
  • usage: "he had coarse manners but a first-rate mind"; "behavior that branded him as common"; "an untutored and uncouth human being"; "an uncouth soldier-a real tough guy"; "appealing to the vulgar taste for violence"; "the vulgar display of the newly rich"
  • synonyms: coarse, common, rough-cut, uncouth
• Of or associated with the great masses of people.
  • usage: "the common people in those days suffered greatly"; "behavior that branded him as common"; "his square plebeian nose"; "a vulgar and objectionable person"; "the unwashed masses"
  • synonyms: common, plebeian, unwashed
• Being or characteristic of or appropriate to everyday language.
  • usage: "common parlance"; "a vernacular term"; "vernacular speakers"; "the vulgar tongue of the masses"; "the technical and vulgar names for an animal species"
  • synonyms: common, vernacular
• Conspicuously and tastelessly indecent.
  • usage: "coarse language"; "a crude joke"; "crude behavior"; "an earthy sense of humor"; "a revoltingly gross expletive"; "a vulgar gesture"; "full of language so vulgar it should have been edited"
  • synonyms: crude, earthy, gross