- (n.) A passage way for conducting a current of fresh, foul or heated air from one place to another.
- (n.) A pipe or passage for conveying flame and hot gases through surrounding water in a boiler; -- distinguished from a tube which holds water and is surrounded by fire. Small flues are called fire tubes or simply tubes.
- (n.) An inclosed passage way for establishing and directing a current of air, gases, etc.; an air passage.
- (n.) A compartment or division of a chimney for conveying flame and smoke to the outer air.
- (n.) Light down, such as rises from cotton, fur, etc.; very fine lint or hair.
- (n.) In an organ flue pipe, the opening between the lower lip and the languet.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). flue. Retrieved September 22, 2026, from http://smartdefine.org/flue/definitions/2008882 |
| Chicago | Webster's. 2011. "flue" http://smartdefine.org/flue/definitions/2008882 (accessed September 22, 2026). |
| Harvard | Webster's 2011, flue, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/flue/definitions/2008882>. |
| MLA | Webster's. "flue" 27 May 2011. Web. 22 September 2026. <http://smartdefine.org/flue/definitions/2008882> |