Definition of flat sour
: fermentation of canned products (as peas or corn) that is caused by thermoduric microorganisms which survive the canning process and that is characterized by the formation of acid without gas sometimes : the off-flavor produced by such fermentation
Comments on flat sour
What made you want to look up flat sour? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
Farm Idioms Quiz
- What does 'poke' refer to in the expression 'pig in a poke'?
Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridgedWords at Play
Ask the Editors
Word Games
Share flat sour