What does the word apprise mean?

Usage examples for apprise

  1. Whenever he chose he could make a circuit around the Winnebagos, and joining the boys beyond, hasten to the hunters' camp and apprise them of their danger; but there remained an abundance of time in which to do that, and he did not wish to leave the vicinity of the enemies until he saw a little more of them. – The Hunters of the Ozark by Edward S. Ellis
  2. This appointment took place on the 22d of March 1806. Josephine, who had kindly promised to apprise me of what the Emperor intended to do for me, as soon as she herself should know his intentions, sent a messenger to acquaint me with my appointment, and to tell me that the Emperor wished to see me. – The Project Gutenberg Memoirs of Napoleon Bonaparte by Bourrienne, Constant, and Stewarton