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[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 Dictionary, © Random House, Inc. 2018.
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Examples from the Web for senility
Contemporary Examples
Historical Examples
  • Not of age—merely of time; for here was no senility, no quavering or fretful lines.

    The Spenders Harry Leon Wilson
  • "Glad your senility has not affected that remnant of your common-sense," he declared.

    Kent Knowles: Quahaug Joseph C. Lincoln
  • Is it a sign of senility, or half-thought-out ideas, or what?

    Cyropaedia Xenophon
  • There's a similar touch of ineptitude (senility, perhaps) in the Memorabilia, ad fin.

    Cyropaedia Xenophon
  • And this is the man they accuse of senility and weak intellect!

  • The moss of senility is covering the bloom of youth and the honor of youth.

    'Charge It' Irving Bacheller
Word Origin and History for senility

1753, from senile + -ity.

Online Etymology Dictionary, © 2010 Douglas Harper
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senility in Medicine

senility se·nil·i·ty (sĭ-nĭl'ĭ-tē)

  1. The state of being senile.

  2. 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.
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