An Upcast

1. (bowling) A cast; a throw.
2. (mining) The ventilating shaft of a mine out of which the air passes after having circulated through the mine.
3. (mining) A current of air passed along such a shaft.
4. (Scotland) An upset, as from a carriage.
5. (Scotland) A taunt; a reproach.
6. (computing) A cast from subtype to supertype.
7. A message transmitted via upcasting.

Synonyms

• (mining): upcast pit, upcast shaft