Source : Webster's Revised Unabridged Dictionary (1913)

Confessional \Con*fes"sion*al\, n. [F. confessional.]
   The recess, seat, or inclosed place, where a priest sits to
   hear confessions; often a small structure furnished with a
   seat for the priest and with a window or aperture so that the
   penitent who is outside may whisper into the priest's ear
   without being seen by him or heard by others.

Confessional \Con*fes"sion*al\, a.
   Pertaining to a confession of faith.

   {Confessional equality}, equality before the law of persons
      confessing different creeds.

Source : WordNet®

confessional
     n : a booth where a priest sits to hear confessions