sour

adjective sourer · sourest · sower · sowre

1. Tasting of acidity. Lemons have a sour taste.
2. Made rancid by fermentation, etc. Don't drink that milk; it's turned sour.
3. Tasting or smelling rancid. His sour breath makes it unpleasing to talk to him.
4. of a person's character Hostile or unfriendly. He gave me a sour look.
5. Excessively acidic and thus infertile. (of soil) sour land
6. Containing excess sulfur. (of petroleum) sour gas smells like rotten eggs
7. Unfortunate or unfavorable. Let me embrace thee, sour adversity
8. Off-pitch, out of tune. Unlike what the name implies, there is nothing inherently wrong with a sour note: It is perfectly well-tuned note that would sound normal in another context (and which presumably would not sound sour to someone unfamiliar with tonal music).

Similar: acetose, acetous, acid, acidulent, sour, tart · Opposite: sweet

noun sours · sower · sowre

1. countable, uncountable The sensation of a sour taste.
2. countable, uncountable A drink made with whiskey, lemon or lime juice and sugar.
3. broadly, countable, uncountable Any cocktail containing lemon or lime juice.
4. countable, uncountable A sweet/candy having a sharply sour taste. “You know I like them candies, especially the lemon sours.”
5. countable, uncountable A sour or acid substance; whatever produces a painful effect. For many Years of Sorrow can dispense; A Dram of Sweet is worth a Pound of Sour
6. countable, uncountable The acidic solution used in souring fabric.

verb sours · souring · soured · sour

1. transitive To make sour. Too much lemon juice will sour the recipe.
2. intransitive To become sour. So the sun's heat, with different powers, / Ripens the grape, the liquor sours.
3. transitive To spoil or mar; to make disenchanted. To sour your happiness I must report, / The queen is dead.
4. intransitive To become disenchanted. We broke up after our relationship soured.
5. transitive To make (soil) cold and unproductive. stagnant water , which tends to sour the soil
6. To macerate (lime) and render it fit for plaster or mortar.
7. transitive To process (fabric) after bleaching, using hydrochloric acid or sulphuric acid to wash out the lime.