n. 25B6; adjective her elderly mother : AGED, old, advanced in years, ageing, long in the tooth, past one's prime; grey-haired, grey-bearded, grizzled, hoary; in one's dotage, decrepit, doddering, doddery, senescent; informal getting on, past it, over the hill, no spring chicken.
youthful.
25B6; noun ( the elderly ) OLD PEOPLE, senior citizens, (old-age) pensioners, OAPs, retired people; geriatrics; N. Amer. seniors, retirees, golden agers; informal (golden) oldies, wrinklies; N. Amer. informal oldsters, woopies.