crisis

noun

1. an unstable situation of extreme danger or difficulty

   noun.state

   Examples

   They went bankrupt during the economic crisis.

   Source: WordNet 3.0

2. a crucial stage or turning point in the course of something

   noun.event

   Examples

   After the crisis the patient either dies or gets better.

   Source: WordNet 3.0

3. The point of time when it is to be decided whether any affair or course of action must go on, or be modified or terminate; the decisive moment; the turning point.

   noun

   Source: webster1913