Sour

a.	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. - Bacon.
	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. He was a scholar . . . Lofty and sour to them that loved him not, But to those men that sought him sweet as summer. - Shak.
	4.	Afflictive; painful.
	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.
n.	1.	A sour or acid substance; whatever produces a painful effect.
v. t.	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. - Swift.
	2.	To make cold and unproductive, as soil.
	3.	To make unhappy, uneasy, or less agreeable. To sour your happiness I must report, The queen is dead. - Shak.
	4.	To cause or permit to become harsh or unkindly. Pride had not sour'd nor wrath debased my heart. - Harte.
	5.	To macerate, and render fit for plaster or mortar; as, to sour lime for business purposes.
v. i.	1.	To become sour; to turn from sweet to sour; as, milk soon sours in hot weather; a kind temper sometimes sours in adversity. [imp. & p. p. Soured ; p. pr. & vb. n. Souring.] They keep out melancholy from the virtuous, and hinder the hatred of vice from souring into severity. - Addison.

Noun	1.	sour - a cocktail made of a liquor (especially whiskey or gin) mixed with lemon or lime juice and sugar
	2.	sour - the taste experience when vinegar or lemon juice is taken into the mouth Synonyms: sourness, tartness
	3.	sour - the property of being acidic Synonyms: acidity, sourness
Verb	1.	sour - go sour or spoil; "The milk has soured"; "The wine worked"; "The cream has turned--we have to throw it out" Synonyms: ferment, turn, work
	2.	sour - make sour or more sour Synonyms: acetify, acidify, acidulate Antonyms: dulcify, dulcorate, edulcorate, sweeten - make sweeter in taste
Adj.	1.	sour - smelling of fermentation or staleness Synonyms: rancid
	2.	sour - having a sharp biting taste Antonyms: sweet - having a pleasant taste (as of sugar)
	3.	sour - one of the four basic taste sensations; like the taste of vinegar or lemons
	4.	sour - in an unpalatable state; "sour milk" Synonyms: turned, off
	5.	sour - inaccurate in pitch; "a false (or sour) note"; "her singing was off key" Synonyms: off-key, false
	6.	sour - 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"; "a sullen crowd" Synonyms: glowering, moody, morose, sullen, saturnine, glum, dour, dark

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