'Conning tower' definitions:

Definition of 'conning tower'

From: WordNet
noun
An armored pilothouse on a warship
noun
A raised bridge on a submarine; often used for entering and exiting

Definition of 'Conning tower'

From: GCIDE
  • Conning tower \Con"ning tow"er\,
  • 1. n. The shot-proof pilot house of a war vessel. [archaic] [1913 Webster]
  • 2. the raised structure rising above the deck of a submarine. [PJC]