| flue pipe or flue | |
| —n | |
| an organ pipe or tubular instrument of the flute family whose sound is produced by the passage of air across a sharp-edged fissure in the side. This sets in motion a vibrating air column within the pipe or instrument | |
| flue or flue | |
| —n | |
| a fool or simpleton; ninny. |
| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |