senility

[ si-nil-i-tee ]
/ sɪˈnɪl ɪ ti /

noun

the state of being senile, especially the weakness or mental infirmity of old age.

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Origin of senility

First recorded in 1770–80; senile + -ity
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for senility

Medical definitions for senility

senility
[ sĭ-nĭlĭ-tē ]

n.

The state of being senile.
The mental and physical deterioration characteristic of old age.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.