Main Entry:

se·nile

Pronunciation:

\ˈsē-ˌnī(-ə)l also ˈse-\

Function:

adjective

Etymology:

Latin senilis, from sen-, senex old, old man

Date:

1661

1: of, relating to, exhibiting, or characteristic of old age <senile weakness> ; especially : exhibiting a loss of cognitive abilities (as memory) associated with old age2: approaching the end of a geological cycle of erosion

— se·nile·ly \-ˌnī(-ə)l-lē\ adverb