The
UNISDR Terminology aims to promote a common understanding and usage of disaster
risk reduction concepts and to assist the disaster risk reduction efforts of
authorities, practitioners and the public. The
2009 version is the result of a process of ongoing review by the UNISDR and
consultations with a broad range of experts and practitioners in various
international venues, regional discussions and national settings. The terms are
now defined by a single sentence. The comments paragraph associated with each
term is not part of the definition, but is provided to give additional context,
qualification and explanation. It should be noted that the terms are not
necessarily mutually exclusive, and in some cases may have overlapping meanings.