Definition of "firebox" [firebox]

• A chamber, such as the furnace of a steam locomotive, in which fuel is burned. (noun)
• A box containing a fire alarm. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "In general, most fireplaces do not have an operable flue damper to control the flow of smoke out the chimney or to keep the cool air from entering the firebox from the chimney above."
• "The back wall of the firebox is the fireback, and its floor is the inner hearth."
• "It's their new model called the "firebox" made of eucalyptus wood and has a curved lid."