The Collaborative International Dictionary of English v.0.48:

Moot \Moot\, n. [AS. m[=o]t, gem[=o]t, a meeting; -- usually in
   comp.] [Written also mote.]
   1. A meeting for discussion and deliberation; esp., a meeting
      of the people of a village or district, in Anglo-Saxon
      times, for the discussion and settlement of matters of
      common interest; -- usually in composition; as, folk-moot.
      --J. R. Green.
      [1913 Webster]

   2. [From Moot, v.] A discussion or debate; especially, a
      discussion of fictitious causes by way of practice.
      [1913 Webster]

            The pleading used in courts and chancery called
            moots.                                --Sir T.
                                                  Elyot.
      [1913 Webster]

   Moot case, a case or question to be mooted; a disputable
      case; an unsettled question. --Dryden.

   Moot court, a mock court, such as is held by students of
      law for practicing the conduct of law cases.

   Moot point, a point or question to be debated; a doubtful
      question.

   to make moot v. t. to render moot[2]; to moot[3].
      [1913 Webster +PJC]

Moby Thesaurus II by Grady Ward, 1.0:

25 Moby Thesaurus words for "moot point":
   bone of contention, catechism, cross-interrogatory, cross-question,
   debating point, demand, feeler, inquiry, interrogation,
   interrogative, interrogatory, issue, leader, leading question,
   point at issue, point in question, problem, query, question,
   question at issue, question mark, quodlibet, topic, trial balloon,
   vexed question