Meaning

1. a chimney
2. a fireplace or hearth
3. a vertical vent, exhaust or gallery
4. a hole at the centre of some models of parachute
5. the glass tube protecting the flame of a kerosene or similar wick lamp
6. a vertical vacuum forming in a gasifier
7. a type of welding fault
8. the exhaust of a volcano
9. a vertical mineral vein
10. large pipe containing ropes that serves to control theater backdrops