sour

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Related to soured: soured cream, Soured milk

sour

1. made acid or bad, as in the case of milk or alcohol, by the action of microorganisms
2. (esp of the weather or climate) harsh and unpleasant
3. (of oil, gas, or petrol) containing a relatively large amount of sulphur compounds
4. Chiefly US any of several iced drinks usually made with spirits, lemon juice, and ice

sour

[sau̇r]
(chemistry)
Containing large amounts of malodorous sulfur compounds (such as mercaptans or hydrogen sulfide), as in crude oils, naphthas, or gasoline.
References in periodicals archive ?
Fill with the soured cream mixture and share the tuna between them.
3 : to harm or damage <The misunderstanding soured their friendship.