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Definition of sour

sour

/ˈsaʊ.ər/
sour

Adverb:sourly
•
Plural:sours
•
Past Simple:soured
•
Past Participle:soured
•
Present Participle:souring
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sour Lexical Profile

sour Game Scores & Validity

• adjective

1

Having a sharp, acidic taste similar to that of lemons or vinegar.

Example

"The unripe green apples were far too sour to eat raw."


2

Resentful, morose, or unpleasant in mood, attitude, or expression.

Example

"He gave a sour look when asked to stay late at the office."


3

Spoiled or fermented into an unpleasant acidic state (especially of milk or other dairy products).

Example

"She poured out the carton of milk after noticing its sour smell."

Synonyms
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Antonyms
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• verb

1

To make or become less pleasant, friendly, or favorable (especially of a relationship, mood, or economic situation).

Example

"A dispute over the family inheritance soured their relationship for years."


2

To make or become acidic, fermented, or spoiled in taste or smell.

Example

"Leaving the cream out on the counter in warm weather will quickly sour it."

Synonyms
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Antonyms
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• noun

1

A mixed alcoholic drink or cocktail made with a base spirit, lemon or lime juice, and sugar.

Example

"The bartender garnished the whiskey sour with a maraschino cherry and an orange slice."


2

The quality or sensation of having a sharp, acidic taste.

Example

"The sauce balances the sweet and the sour in every bite."

Synonyms
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Antonyms
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• Rhymes for sour

Word Origin & Etymology

Inherited from Old English 'sur', meaning acidic or sharp to the taste, derived from Proto-Germanic '*suraz' and ultimately from the Proto-Indo-European root '*suro-' (sour, salty, or bitter).

Cite this Entry


Wordmom. (2026). Definition of Sour. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/sour
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