'Smokestack' definitions:

Definition of 'smokestack'

From: WordNet
noun
A large tall chimney through which combustion gases and smoke can be evacuated [syn: smokestack, stack]

Definition of 'Smokestack'

From: GCIDE
  • Smokestack \Smoke"stack`\, n. A chimney; esp., a pipe serving as a chimney, as the pipe which carries off the smoke of a locomotive, the funnel of a steam vessel, etc. [1913 Webster]