A supercentenarian is someone who has reached the age of 110 years or more, something achieved by only one in a thousand centenarians.

About one supercentenarian in fifteen lives to 114 years or more. The term has been around from around the 1970s and was further popularized in 1991 by William Strauss and Neil Howe, in their book Generations.

Early references tend to mean simply "someone well over 100" but the 110-and-over cutoff is apparently the accepted criterion by demographers.