'Senile' definitions:

Definition of 'senile'

From: WordNet
adjective
Mentally or physically infirm with age; "his mother was doddering and frail" [syn: doddering, doddery, gaga, senile]

Definition of 'Senile'

From: GCIDE
  • Senile \Se"nile\, a. [L. senilis, from senex, gen. senis, old, an old man: cf. F. s['e]nile. See Senior.] 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. [1913 Webster]
  • Senile gangrene (Med.), a form of gangrene occuring particularly in old people, and caused usually by insufficient blood supply due to degeneration of the walls of the smaller arteries. [1913 Webster]

Synonyms of 'senile'

From: Moby Thesaurus