vulgar

1. (historical or derogatory) Having to do with ordinary, common people.Examples: "Near-synonyms: vulgate; vulgarized"; "It might be more useful to the English reader […] to write in our vulgar language."; "The mechanical process of multiplying books had brought the New Testament in the vulgar tongue within the reach of every class."Synonyms: common, ordinary, popularderogatoryhistorical

2. (especially taxonomy) Common, usual; of the typical kind.Examples: "vulgar bush brown (Bicyclus vulgaris)"; "A vulture (V. aura), probably the Acabiry first described by Azara, is here called […] the hunter. It resembles in form the vulgar bird, but it flies high. The head is red, and the wings are black with silver lining, like the noble Bateleur of Africa."especially

3. (mathematics) Being a vulgar fraction.Examples: "A fraction is vulgar if it has one integer divided by another integer, as long as the integer that's doing the dividing isn't equal to zero."