The Collaborative International Dictionary of English v.0.48:

Moot-hall \Moot"-hall`\, Moot-house \Moot"-house`\, n. [AS.
   m[=o]th?s.]
   A hall for public meetings; a hall of judgment. [Obs.] "The
   moot-hall of Herod." --Wyclif.
   [1913 Webster]