Source : Webster's Revised Unabridged Dictionary (1913)

Lyceum \Ly*ce"um\, n.; pl. E. {Lyceums}, L. {Lycea}. [L. lyceum,
   Gr. ?, so named after the neighboring temple of ? ? Apollo
   the wolf slayer, prob. fr. ? belonging to a wolf, fr ? wolf.
   See {Wolf}.]
   1. A place of exercise with covered walks, in the suburbs of
      Athens, where Aristotle taught philosophy.

   2. A house or apartment appropriated to instruction by
      lectures or disquisitions.

   3. A higher school, in Europe, which prepares youths for the
      university.

   4. An association for debate and literary improvement.

Source : WordNet®

lyceum
     n 1: a school for students intermediate between elementary school
          and college; usually grades 9 to 12 [syn: {secondary
          school}, {lycee}, {Gymnasium}, {middle school}]
     2: a public hall for lectures and concerts