What does the word peradventure mean?

Usage examples for peradventure

  1. My father was wont to say that Mar Shalmon was strange and peradventure not possessed of all his senses to neglect his store of wealth and treasure. – Jewish Fairy Tales and Legends by Gertrude Landa
  2. During the assault not one of the garrison had been taken prisoner, and certain it was that the besiegers had not left the vicinity of the fort for such length of time as would be sufficient to enable them to procure captives elsewhere, therefore did we know beyond a peradventure who the victims would be, but why only two were to suffer was something at which we could not even so much as guess. – The Minute Boys of the Mohawk Valley by James Otis