Definition of "flue" in English

noun

1. A pipe or duct that carries gaseous combustion products away from the point of combustion (such as a furnace).

2. An enclosed passageway in which to direct a current of air or other gases along.

3. (obsolete, countable and uncountable) A woolly or downy substance; down, nap; a piece of this.

4. In an organ flue pipe, the opening between the lower lip and the languet.

adjective

1. (UK, dialect) Alternative form of flew (“shallow, flat”).