1. Air passage consisting of a ventilation shaft through which air leaves a mine
   "The upcast shaft helped maintain air circulation in the deep mine"

1. Thrown or directed upwards
   "The upcast light created interesting shadows"

1. Throw or direct upwards
   "The volcano upcast ash and smoke into the atmosphere"

Derived forms: upcast, upcasting, upcasts

Type of: air duct, air passage, airway