Noun sour mash has 2 senses
  1. sour mash - a mash with optimum acidity for yeast fermentation; a mixture of old and new mash; used in distilling some whiskeys
    --1 is a kind of
    mash
  2. sour mash, sour mash whiskey - any whiskey distilled from sour mash
    --2 is a kind of whiskey, whisky
,
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