senile Meaning, Definition & Usage

  1. adjective satellite mentally or physically infirm with age
    gaga; doddering; doddery.
    • his mother was doddering and frail

WordNet

Se"nile adjective
Etymology
L. senilis, from senex, gen. senis, old, an old man: cf. F. sénile. See Senior.
Definitions
  1. Of or pertaining to old age; proceeding from, or characteristic of, old age; affected with the infirmities of old age; as, senile weakness. "Senile maturity of judgment." Boyle.

Webster 1913