senility

The state of being senile; old age; especially, the weakness or imbecility of old age.

The quality or state of being senile; old age.

Senescence; the bodily and mental deterioration associated with old age.

The losing of memory and reason due to senescence.

An elderly, senile person.

the state of being senile

mental infirmity as a consequence of old age; sometimes shown by foolish infatuations