Meaning of the word senile in English

What does senile mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

senile

US /ˈsen.aɪl/
UK /ˈsiː.naɪl/

Adjective

having or showing the weaknesses or diseases of old age, especially a loss of mental faculties

Example:
The old man became increasingly senile, often forgetting where he was.
It's sad to see someone so vibrant become so senile.