Pronunciation: (smōk'stak"), [key]
Also called stack. a pipe for the escape of the smoke or gases of combustion, as on a steamboat, locomotive, or building.
pertaining to, engaged in, or dependent on a basic heavy industry, as steel or automaking: smokestack companies.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.