#oldster__old_person__oldperson__senior_citizen  an elderly person
  supertype:  #grownup__adult  a fully developed person from maturity onward
  subtype:  #antediluvian  a very old (or old fashioned) person
  subtype:  #centenarian  someone who is at least 100 years old
  subtype:  #curmudgeon  a crusty irascible cantankerous old person full of stubborn ideas
  subtype:  #dodderer  one who dodders from old age and weakness
  subtype:  #dodo__fogy__fogey__fossil  (informal) someone whose style is out of fashion
  subtype:  #dotard  an oldster in his dotage; someone whose age has impaired his intellect
  subtype:  #has-been__hasbeen__back-number  someone who is no longer popular
  subtype:  #nonagenarian  someone whose age is in the nineties
  subtype:  #octogenarian  someone whose age is in the eighties
  subtype:  #old_boy__oldboy  a vivacious elderly man
  subtype:  #greybeard__old_man__graybeard__Methuselah  a man who is very old
     subtype:  #old_codger__oldcodger__codger  used affectionately to refer to an eccentric but amusing old man
     subtype:  #patriarch.greybeard  a man who is older and higher in rank than yourself
     subtype:  #mossback__old-timer__oldtimer__gaffer__old_geezer__oldgeezer__antique  an elderly man
  subtype:  #old_woman__oldwoman  a woman who is old
     subtype:  #beldam__beldame  a woman of advanced age
     subtype:  #granny__matriarch  an old woman
     subtype:  #hag__beldame__crone  an ugly evil-looking old woman
     subtype:  #mother.old_woman  a term of address for an elderly woman
  subtype:  #septuagenarian  someone whose age is in the seventies
  subtype:  #sexagenarian  someone whose age is in the sixties

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