What does the word so mean?

Usage examples for so

  1. Was it not so? – Early Plays Catiline, The Warrior's Barrow, Olaf Liljekrans by Henrik Ibsen
  2. Then why did you not tell us so? – Further Experiences of an Irish R.M. by E. OEnone Somerville Martin Ross
  3. And so- what is it? – The Orange-Yellow Diamond by J. S. Fletcher