Definition: Mercure Insurance is a type of insurance that protects people from the financial losses caused by natural disasters, such as floods, earthquakes, hurricanes, or storms, and certain types of accidents. The term "mercurial" means unpredictable, so it's not clear what specific actions are mercurial in this context. In summary, mercure insurance is a type of insurance designed to protect individuals from financial losses caused by natural disasters like floods or landslides.