D defs.my
Entry 2 senses Webster, 1913

Crisis

/(kr?"s?s)/ · Cri·sis · IPA /ˈkɹaɪsɪs/
01 n. 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 mom…
pl. Crises ((-s�z))
  1. 1.
    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.
    “This hour's the very crisis of your fate.” Dryden.
    “The very times of crisis for the fate of the country.” — Brougham.
  2. 2.
    That change in a disease which indicates whether the result is to be recovery or death; sometimes, also, a striking change of symptoms attended by an outward manifestation, as by an eruption or sweat.(Med.)
    “Till some safe crisis authorize their skill.” Dryden.