Definition of senility noun from the Oxford Advanced Learner's Dictionary

 

senility

 noun
noun
BrE BrE//səˈnɪləti//
 
; NAmE NAmE//səˈnɪləti//
 
[uncountable]
 
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the condition of being senile (= behaving in a confused or strange way, and being unable to remember things, because you are old) an old man on the verge of senility