Definition of "extinctions" []

• Plural form of extinction. (noun)

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• "'Our position on these extinctions is that they are more likely to be off the radar than off the planet, 'James said."
• "In particular, Rohani and Wearing looked for matches in two key measures: the number of years between big outbreaks and the frequency of "extinctions" - periods of time when no whooping cough cases were reported in the population."
• "In particular, Rohani and Wearing looked for matches in two key measures: the number of years between big outbreaks and the frequency of "extinctions" --- periods of time when no whooping cough cases were reported in the population."