emergency -
The quality of being emergent; sudden or unexpected appearance; an unforeseen occurrence.
Adjektiv
emergency -
Related to the emergency or to the provision of assistance.
Wikipedia
An emergency is a situation that poses an immediate risk to health, life, property or environment. Most emergencies require urgent intervention to prevent a worsening of the situation, although in some situations, mitigation may not be possible and agencies may only be able to offer palliative care for the aftermath. While some emergencies are self evident (such as a natural disaster that threatens many lives), many smaller incidents require the subjective opinion of an observer (or affected party) in order to decide whether it qualifies as an emergency.
OmegaWiki Dictionary
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emergency A situation such as a natural or man-made disaster requiring urgent assistance.