senility

noun

se·​nil·​i·​ty si-ˈni-lə-tē How to pronounce senility (audio)
 also  se-
: the quality or state of being senile : the physical and mental decline associated with old age
especially : the deterioration of cognitive functioning associated with old age

Note: Due to its negative implication that cognitive decline is part of the normal aging process, use of the term senility is now typically avoided in medical contexts and may be considered offensive in general contexts. Dementia is usually considered the appropriate term to use when describing the serious progressive cognitive decline that most commonly affects older adults.

Examples of senility in a Sentence

with his increasing senility, Granddad is beginning to have more and more senior moments
Recent Examples on the Web The mood changed in the late 1950s, however, when U.S. officials in South Korea increasingly took note of Rhee’s apparent senility. Joshua Byun, Foreign Affairs, 18 July 2024 These two cases also underscore how foreign suspicions of senility can have significant ramifications for foreign policy. Joshua Byun, Foreign Affairs, 18 July 2024 Judge cites Kelly’s age and senility as reasons to dismiss the prosecution’s request In an under advisement order, Santa Cruz County Superior Court Judge Thomas Fink granted the defense's motion to dismiss the case with prejudice partly because of Kelly’s age. Sarah Lapidus, The Arizona Republic, 10 July 2024 After Thelma’s duped out of $10,000 by a caller claiming Danny has been arrested and needs bail money, her family (Parker Posey and Clark Gregg) chalk it up to senility in need of a nursing home. Ryan Lattanzio, IndieWire, 21 June 2024 See all Example Sentences for senility 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'senility.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1652, in the meaning defined above

Time Traveler
The first known use of senility was in 1652

Dictionary Entries Near senility

Cite this Entry

“Senility.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/senility. Accessed 19 Aug. 2024.

Kids Definition

senility

noun
se·​nil·​i·​ty si-ˈnil-ət-ē How to pronounce senility (audio)
: the quality or state of being senile
especially : a decline in mental abilities that is associated with old age

Medical Definition

senility

noun
se·​nil·​i·​ty
si-ˈnil-ət-ē also se-
plural senilities
: the quality or state of being senile : the physical and mental decline associated with old age
especially : the deterioration of cognitive functioning associated with old age

Note: Due to its negative implication that cognitive decline is part of the normal aging process, use of the term senility is now typically avoided in medical contexts and may be considered offensive in general contexts. Dementia is usually considered the appropriate term to use when describing the serious progressive cognitive decline that most commonly affects older adults.

More from Merriam-Webster on senility

Last Updated: - Updated example sentences
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