'Emergency' definitions:

Definition of 'emergency'

From: WordNet
noun
A sudden unforeseen crisis (usually involving danger) that requires immediate action; "he never knew what to do in an emergency" [syn: emergency, exigency, pinch]
noun
A state in which martial law applies; "the governor declared a state of emergency"
noun
A brake operated by hand; usually operates by mechanical linkage [syn: hand brake, emergency, emergency brake, parking brake]

Definition of 'Emergency'

From: GCIDE
  • Emergency \E*mer"gen*cy\, n.; pl. Emergencies. [See Emergence.]
  • 1. Sudden or unexpected appearance; an unforeseen occurrence; a sudden occasion. [1913 Webster]
  • Most our rarities have been found out by casual emergency. --Glanvill. [1913 Webster]
  • 2. An unforeseen occurrence or combination of circumstances which calls for immediate action or remedy; pressing necessity; exigency. [1913 Webster]
  • To whom she might her doubts propose, On all emergencies that rose. --Swift. [1913 Webster]
  • A safe counselor in most difficult emergencies. --Brougham.
  • Syn: Crisis; conjuncture; exigency; pinch; strait; necessity. [1913 Webster]

Synonyms of 'emergency'

From: Moby Thesaurus