noun
- plural of upcast; shafts or passages through which air flows upward in a mine
Usage: mining
verb
- third person singular present of upcast; throws or casts upward
Examples
- The mine’s upcasts carried fresh air to the surface.
- Several upcasts were blocked after the cave-in.
- He upcasts the fishing line toward the overhanging branch.
- The volcano upcasts molten rock high into the air.
- Engineers inspected all the upcasts for proper ventilation.