emergency
1. [ noun ] a sudden unforeseen crisis (usually involving danger) that requires immediate action
Synonyms: pinch exigency
Examples:

"he never knew what to do in an emergency"

Related terms: crisis
2. [ noun ] a state in which martial law applies
Examples:

"the governor declared a state of emergency"

Related terms: temporary_state
3. [ adjective ] made necessary by sudden occurrence demanding immediate remedy
Examples:

"the plane made an emergency landing" "an emergency session to consider aid for the earthquake victims"

Related terms: unscheduled
4. [ noun ] (transportation) a brake operated by hand; usually operates by mechanical linkage
Synonyms: hand_brake parking_brake emergency_brake
Related terms: brake
Similar spelling:   emerge
  emergence
  emergent
  emerging
  emerson