'Whispering dome' definitions:

Definition of 'whispering dome'

From: WordNet
noun
A space beneath a dome or arch in which sounds produced at certain points are clearly audible at certain distant points [syn: whispering gallery, whispering dome]

Definition of 'Whispering dome'

From: GCIDE
  • Whispering \Whis"per*ing\, a. & n. from Whisper. v. t. [1913 Webster]
  • Whispering gallery, or Whispering dome, one of such a form that sounds produced in certain parts of it are concentrated by reflection from the walls to another part, so that whispers or feeble sounds are audible at a much greater distance than under ordinary circumstances. The dome of the U. S. capitol building is one example. [1913 Webster +PJC]