emergency

Noun
  1. A sudden unforeseen crisis (usually involving danger) that requires immediate action (synset 107432005)
    "he never knew what to do in an emergency"
  2. A state in which martial law applies (synset 114056081)
    "the governor declared a state of emergency"
  3. A brake operated by hand;
    Usually operates by mechanical linkage (synset 103488720)

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