war·den /ˈwɔrdṇ/
  典獄官,看守人,學監,區長
  Ward·en n.
  1. A keeper; a guardian; a watchman.
     He called to the warden on the . . . battlements.   --Sir. W. Scott.
  2. An officer who keeps or guards; a keeper; as, the warden of a prison.
  3. A head official; as, the warden of a college; specifically Eccl., a churchwarden.
  4.  A large, hard pear, chiefly used for baking and roasting.  [Obs.]
     I would have had him roasted like a warden.   --Beau. & Fl.
  Warden pie, a pie made of warden pears. [Obs.]
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  warden
       n : the chief official in charge of a prison [syn: warder]