What does the word vulgarism mean?

Usage examples for vulgarism

  1. Or, again, he may omit the comma, and say, " I saw the thing what I wanted to see;" but this, if it be not a vulgarism, will only mean, " I saw the thing to be what I wanted to see." – The Grammar of English Grammars by Goold Brown
  2. And now when you come to print these fragments, would it not be well if you were to stoop to the vulgarism of prefixing some word of introduction, as other people do, you know, ... – The Letters of Robert Browning and Elizabeth Barrett Barrett, Vol. 1 (of 2) 1845-1846 by Robert Browning and Elizabeth Barrett Barrett