Noun
the property of being acidic

Noun
the taste experience when vinegar or lemon juice is taken into the mouth

Noun
a cocktail made of a liquor (especially whiskey or gin) mixed with lemon or lime juice and sugar

Verb
go sour or spoil; "The milk has soured"; "The wine worked"; "The cream has turned--we have to throw it out"

Verb
make sour or more sour

Adjective S.
smelling of fermentation or staleness

Adjective S.
showing a brooding ill humor; "a dark scowl"; "the proverbially dour New England Puritan"; "a glum, hopeless shrug"; "he sat in moody silence"; "a morose and unsociable manner"; "a saturnine, almost misanthropic young genius"- Bruce Bliven; "a sour temper

Adjective S.
inaccurate in pitch; "a false (or sour) note"; "her singing was off key"

Adjective
having a sharp biting taste

Adjective S.
in an unpalatable state; "sour milk"

Adjective S.
one of the four basic taste sensations; like the taste of vinegar or lemons

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superl.
Having an acid or sharp, biting taste, like vinegar, and the juices of most unripe fruits; acid; tart.

superl.
Changed, as by keeping, so as to be acid, rancid, or musty, turned.

superl.
Disagreeable; unpleasant; hence; cross; crabbed; peevish; morose; as, a man of a sour temper; a sour reply.

superl.
Afflictive; painful.

superl.
Cold and unproductive; as, sour land; a sour marsh.

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

v. t.
To cause to become sour; to cause to turn from sweet to sour; as, exposure to the air sours many substances.

v. t.
To make cold and unproductive, as soil.

v. t.
To make unhappy, uneasy, or less agreeable.

v. t.
To cause or permit to become harsh or unkindly.

v. t.
To macerate, and render fit for plaster or mortar; as, to sour lime for business purposes.

v. i.
To become sour; to turn from sweet to sour; as, milk soon sours in hot weather; a kind temper sometimes sours in adversity.

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Sour

Sour , a. [Compar. Sourer ; superl. Sourest.] [OE. sour, sur, AS. sr; akin to D. zuur, G. sauer, OHG. sr, Icel. srr, Sw. sur, Dan. suur, Lith. suras salt, Russ. surovui harsh, rough. Cf. Sorrel, the plant.] 1. Having an acid or sharp, biting taste, like vinegar, and the juices of most unripe fruits; acid; tart.

All sour things, as vinegar, provoke appetite.

2. Changed, as by keeping, so as to be acid, rancid, or musty, turned. 3. Disagreeable; unpleasant; hence; cross; crabbed; peevish; morose; as, a man of a sour temper; a sour reply. "A sour countenance." Swift.

He was a scholar . . . Lofty and sour to them that loved him not, But to those men that sought him sweet as summer.

4. Afflictive; painful. "Sour adversity." Shak. 5. Cold and unproductive; as, sour land; a sour marsh. Sour dock (Bot.), sorrel. -- Sour gourd (Bot.), the gourdlike fruit Adansonia Gregorii, and A. digitata; also, either of the trees bearing this fruit. See Adansonia. -- Sour grapes. See under Grape. -- Sour gum (Bot.) See Turelo. -- Sour plum (Bot.), the edible acid fruit of an Australian tree (Owenia venosa); also, the tree itself, which furnished a hard reddish wood used by wheelwrights. Syn. -- Acid; sharp; tart; acetous; acetose; harsh; acrimonious; crabbed; currish; peevish.

Sour

Sour, n. A sour or acid substance; whatever produces a painful effect. Spenser.

Sour

Sour, v. t. [AS. srian to sour, to become sour.] 1. To cause to become sour; to cause to turn from sweet to sour; as, exposure to the air sours many substances.

So the sun's heat, with different powers, Ripens the grape, the liquor sours.

2. To make cold and unproductive, as soil. Mortimer. 3. To make unhappy, uneasy, or less agreeable.

To sour your happiness I must report, The queen is dead.

4. To cause or permit to become harsh or unkindly. "Souring his cheeks." Shak.

Pride had not sour'd nor wrath debased my heart.

5. To macerate, and render fit for plaster or mortar; as, to sour lime for business purposes.

Sour

Sour, v. i. [imp. & p. p. Soured ; p. pr. & vb. n. Souring.] To become sour; to turn from sweet to sour; as, milk soon sours in hot weather; a kind temper sometimes sours in adversity.

They keep out melancholy from the virtuous, and hinder the hatred of vice from souring into severity.

Having an acid or sharp, biting taste, like vinegar, and the juices of most unripe fruits; acid; tart.

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

To cause to become sour; to cause to turn from sweet to sour; as, exposure to the air sours many substances.

To become sour; to turn from sweet to sour; as, milk soon sours in hot weather; a kind temper sometimes sours in adversity.