Dictionary

senile

adjective se·nile \ˈsē-ˌnī(-ə)l also ˈse-\

: showing a loss of mental ability (such as memory) in old age

Full Definition of SENILE

1
:  of, relating to, exhibiting, or characteristic of old age <senile weakness>; especially :  exhibiting a loss of cognitive abilities (as memory) associated with old age
2
:  approaching the end of a geological cycle of erosion
se·nile·ly \-ˌnī(-ə)l-lē\ adverb

Examples of SENILE

  1. a senile man in his eighties
  2. Her mother is becoming senile.
  3. Every time I got a government job, I always felt obligated to tell the authorities that I had this mother who had probably been a Communist. It was an annoying piece of baggage. Then eventually she became senile and forgot about politics and actually became very benign. —Larissa MacFarquhar, New Yorker, 10 Dec. 2001

Origin of SENILE

Latin senilis, from sen-, senex old, old man
First Known Use: 1661

Other Medicine Terms

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Medical Dictionary

senile

adjective se·nile \ˈsēn-ˌīl also ˈsen-\

Medical Definition of SENILE

1
:  of, relating to, exhibiting, or characteristic of old age <senile weakness>; especially :  exhibiting a loss of mental faculties associated with old age
2
:  being a cell that cannot undergo mitosis and is in the stage of declining functional capacities prior to the time of death <senile red blood cells>

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