lon·gev·i·ty 
/lɑnˈʤɛvəti/ noun
/lɑnˈʤɛvəti/ noun [noncount] 1 a : long life : the fact of living for many years
▪ His longevity was remarkable considering he had been so sick when he was a child. ▪ The members of that family are famous for their longevity. [=for living to be very old]
b : length of life
▪ Better medical treatment has led to greater longevity. ▪ a study of human longevity 2 : the length of time that something or someone lasts or continues
▪ The longevity of a car's tires depends on how the car is driven. ▪ She's a talented athlete, but many people have doubts about her longevity. [=about how long her athletic career will last] ▪ They're trying to increase the product's longevity.
▪ His longevity was remarkable considering he had been so sick when he was a child. ▪ The members of that family are famous for their longevity. [=for living to be very old]
b : length of life
▪ Better medical treatment has led to greater longevity. ▪ a study of human longevity
▪ The longevity of a car's tires depends on how the car is driven. ▪ She's a talented athlete, but many people have doubts about her longevity. [=about how long her athletic career will last] ▪ They're trying to increase the product's longevity.
