Occasionally used as a countable noun meaning ‘a person who is senile’; attested in reputable corpora and dictionaries, though marked rare or disparaging.

Synonyms

pensioner

senile person

dotard

old person

elderly person

aged person

Definitions

senileadjective

Exhibiting a decline in mental faculties, such as memory, due to old age.

The senile professor often forgot where he left his glasses.

Relating to or characteristic of old age.

Senile spots often appear on the skin of elderly individuals.

senilenoun

An elderly person exhibiting mental or physical decline associated with old age (usually considered disparaging).

The facility is equipped to care for seniles who need constant supervision.