The dictionary defines ageism as the "tendency to regard older persons as debilitated, unworthy of attention, or unsuitable for employment." But research indicates that ageism may not just be ill-informed or hurtful. It may also be a matter of life and death.
Not that it's literally killing people. Researcher Becca Levy, a professor of epidemiology and psychology at the Yale School of Public Health, says it depends on how much a given individual takes those negative ideas to heart.