Medical Definition of death rate
: a measure of the number of deaths in a specified population during a particular time period <After five years, those receiving the drug suffered 32 percent fewer fatal heart attacks, and their overall death rate was 22 percent lower than that of the men who were given the placebo.—Isadore Rosenfeld, Vogue, February 1996> <Ebola is infamous for being highly contagious and causing death rates as high as 90 percent in some human outbreaks.—Brendan Borrell, Scientific American, September 2009>
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