What does the word crisis mean?

Usage examples for crisis

  1. I would not have it supposed that, although the crisis was past, there was no more stormy weather. – Warlock o' Glenwarlock by George MacDonald
  2. And it was at least a strange comment on the teaching force in the Burrton school that Walter at this crisis could not think of anyone to whom he cared to go with a religious doubt. – The High Calling by Charles M. Sheldon