stum

UK: /stʌm/ US: (stum)

Inflections of 'stum' (v): (⇒ conjugate)

stums

v 3rd person singular

stumming

v pres p

stummed

v past

stummed

v past p

WordReference Random House Unabridged Dictionary of American English © 2025

stum (stum),  n., v., stummed, stum•ming. 

n. 

1. Wine unfermented or partly fermented grape juice.
2. Wine wine in which increased fermentation has taken place because of the addition of stum.

v.t. 

3. Wine to increase the fermentation of (wine) by adding stum.

• Dutch stom dumb, dull; compare French vin muet, German stummer Wein, in the same sense
• 1650–60

Collins Concise English Dictionary © HarperCollins Publishers::

stum / stʌm/(in wine-making) noun

1. a less common word for must3
2. partly fermented wine added to fermented wine as a preservative

verb (stums, stumming, stummed)

1. to preserve (wine) by adding stum

Etymology: 17th Century: from Dutch stom dumb; related to German stumm