[ si-nil-i-tee ]
/ sɪˈnɪl ɪ ti /


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

Origin of senility

First recorded in 1770–80; senile + -ity Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for senility

Medicine definitions for senility


[ sĭ-nĭlĭ-tē ]


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.