Definition of stum in English:

stum

noun

mass noun
  • Unfermented grape juice.

verb

[WITH OBJECT]
  • 1Prevent or stop the fermentation of (wine) by fumigating a cask with burning sulphur.

  • 2Renew the fermentation of (wine) by adding stum.

Origin

Mid 17th century: from Dutch stom (noun), stommen (verb), from stom ‘dumb’.

Pronunciation

stum

/stʌm/