Source : Webster's Revised Unabridged Dictionary (1913)

Tipstaff \Tip"staff`\, n.; pl. {Tipstaff}.
   1. A staff tipped with metal. --Bacon.

   2. An officer who bears a staff tipped with metal; a
      constable. --Macaulay.

Tipstaff \Tip"staff`\, n.; pl. {Tipstaff}.
   1. A staff tipped with metal. --Bacon.

   2. An officer who bears a staff tipped with metal; a
      constable. --Macaulay.

Source : WordNet®

tipstaff
     n : staff with a metal tip carried as a sign of office by e.g. a
         bailiff or constable