Source : Webster's Revised Unabridged Dictionary (1913)

Superannuation \Su`per*an`nu*a"tion\, n.
   The state of being superannuated, or too old for office or
   business; the state of being disqualified by old age;
   decrepitude.

         The world itself is in a state of superannuation.
                                                  --Cowper.

         Slyness blinking through the watery eye of
         superannuation.                          --Coleridge.

Source : WordNet®

superannuation
     n 1: a monthly payment made to someone who is retired from work
          [syn: {old-age pension}, {retirement pension}, {retirement
          check}, {retirement benefit}, {retirement fund}]
     2: the property of being out of date and not current [syn: {obsoleteness}]
     3: the act of discharging someone because of age (especially to
        cause someone to retire from service on a pension)