'Elderly' definitions:

Definition of 'elderly'

(from WordNet)
adjective
Advanced in years; (`aged' is pronounced as two syllables); "aged members of the society"; "elderly residents could remember the construction of the first skyscraper"; "senior citizen" [syn: aged, elderly, older, senior]
noun
People who are old collectively; "special arrangements were available for the aged" [syn: aged, elderly] [ant: young, youth]

Definition of 'Elderly'

From: GCIDE
  • Elderly \Eld"er*ly\, a. Somewhat old; advanced beyond middle age; bordering on old age; as, elderly people. [1913 Webster]

Synonyms of 'elderly'

From: Moby Thesaurus