A flue is a pipe, or opening in a chimney for conveying exhaust gases from a fireplace, furnace, water heater, boiler, or generator to the outdoors. Historically the term flue meant the chimney itself. [1]

The meaning of FLUE is an enclosed passageway for directing a current.

Instead of a single common flue, they advocate separate ones for each fireplace. The chimney flue must have an enormous supply of air, and it simply draws it from the most easily accessible places.

FLUE definition: a passage or duct for smoke in a chimney. See examples of flue used in a sentence.

A flue is a pipe or long tube that acts as a chimney, taking smoke away from a device such as a heater, fire, or cooker. The chimney flues were repaired and relined.

Some, including the fireplace serviceman, say to keep the flue open all the time; others say to open it only during active use.

6 days ago · The CDC continues to encourage folks to get influenza vaccinations, especially children and people who are pregnant. As the flu season remains underway, here's what to know about …

Definition of flue noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Dec 29, 2025 · flue (comparative more flue, superlative most flue) (UK, dialect) Alternative form of flew (“shallow, flat”).

flue (flu) n. 1. a passage or duct for smoke in a chimney. 2. any duct or passage for air, gas, or the like. 3. a tube, esp. a large one, in a fire-tube boiler.