"emergency" in the noun sense
1. emergency, exigency, pinch
a sudden unforeseen crisis (usually involving danger) that requires immediate action
"he never knew what to do in an emergency"
2. emergency
a state in which martial law applies
"the governor declared a state of emergency"
3. hand brake, emergency, emergency brake, parking brake
a brake operated by hand usually operates by mechanical linkage
Source: WordNet® (An amazing lexical database of English)
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