sour

adjective

1. 1.

   Tasting of acidity.

2. 2.

   Made rancid by fermentation, etc.

3. 3.

   Tasting or smelling rancid.

4. 4.

   of a person's character

   Hostile or unfriendly.

5. 5.

   Excessively acidic and thus infertile. (of soil)

6. 6.

   Containing excess sulfur. (of petroleum)

noun

1. 1.

   A drink made with whiskey, lemon or lime juice and sugar.

2. 2.

   A sour or acid substance; whatever produces a painful effect.

3. 3.

   by extension

   Any cocktail containing lemon or lime juice.

4. 4.

   The sensation of a sour taste.

5. 5.

   A sweet/candy having a sharply sour taste.

6. 6.

   The acidic solution used in souring fabric.

verb

1. 1.

   transitive

   To spoil or mar; to make disenchanted.

2. 2.

   intransitive

   To become disenchanted.

3. 3.

   transitive

   To make (soil) cold and unproductive.

4. 4.

   To macerate (lime) and render it fit for plaster or mortar.

5. 5.

   transitive

   To process (fabric) after bleaching, using hydrochloric acid or sulphuric acid to wash out the lime.

6. 6.

   Go sour or spoil

Compound terms

Established multiword terms.

• sour grapesnounCompound term

  Disparagement of something that is unattainable.

• sour grassnounCompound term

  Any of certain coarse weedy plants with long taproots, sometimes used as table greens or in folk medicine.

• sour gumnounCompound term

  Columnar tree of eastern North America having horizontal limbs and small leaves that emerge late in spring and have brilliant color in early fall.

• sour-gum familynounCompound term

  A family of dicotyledonous trees of order Myrtales that includes the sour gum trees.

• sour mashnounCompound term

  A mash with optimum acidity for yeast fermentation.

• sour mash whiskeynounCompound term

  Any whiskey distilled from sour mash.