Definition of upcast in English:

upcast

Syllabification: up·cast
Pronunciation: /ˈəpˌkast
 
/

noun

(also upcast shaft)
  • A shaft through which air leaves a mine.
    More example sentences
    • Approaching demolition, various holes appeared in the brickwork of the upcast shaft allowing access to the foolhardy.
    • One of the shafts at Whinney Hill then became the upcast shaft for both collieries.
    • A new upcast shaft was sunk by Allied Constructions Pty Ltd.

verb

(past and past participle upcast) [with object] Back to top  
  • Cast (something) upward: (as adjective upcast) upcast light

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Pronunciation: skəʊʃ
noun
a small amount; a little