noun
- an upward current of air
- a shaft in a mine through which air passes upward
Usage: mining
adjective
- directed or thrown upward
Examples
- The glider rode the upcast from the heated valley floor.
- Birds often use upcast air currents to soar without flapping their wings.
- The mine’s upcast shaft helped ventilate the underground tunnels.
- Engineers designed the upcast system to improve air circulation.
- She gave him an upcast glance before looking away.
- The upcast beam of light illuminated the ceiling.