Definition from Wiktionary, the free dictionary
- Cast up; thrown upward.
- with upcast eyes
- (Can we find and add a quotation of Joseph Addison to this entry?)
upcast (plural upcasts)
- (bowling) A cast; a throw.
- (Can we find and add a quotation of Shakespeare to this entry?)
- (mining) The ventilating shaft of a mine out of which the air passes after having circulated through the mine.
- (Scotland) An upset, as from a carriage.
- (Scotland) A taunt; a reproach.
- (Can we find and add a quotation of Sir Walter Scott to this entry?)
- (computing) A cast from subtype to supertype.
- A message transmitted via upcasting.
Coordinate terms 
- (mining): downcast
- (transitive, obsolete) To cast or throw up; to turn upward.
- (transitive, Scotland) To taunt; to reproach; to upbraid.
- (transitive, computing) To cast from subtype to supertype.
- To broadcast a message or data to aircraft or satellites, especially via radio waves; as opposed to uplinking to a specific satellite or aircraft
- IPA: /ʌpˈkast/