From The Collaborative International Dictionary of English v.0.48:
Sour \Sour\, v. t. [AS. s?rian 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.
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So the sun's heat, with different powers,
Ripens the grape, the liquor sours. --Swift.
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2. To make cold and unproductive, as soil. --Mortimer.
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3. To make unhappy, uneasy, or less agreeable.
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To sour your happiness I must report,
The queen is dead. --Shak.
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4. To cause or permit to become harsh or unkindly. "Souring
his cheeks." --Shak.
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Pride had not sour'd nor wrath debased my heart.
--Harte.
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5. To macerate, and render fit for plaster or mortar; as, to
sour lime for business purposes.
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From The Collaborative International Dictionary of English v.0.48:
Sour \Sour\, a. [Compar. Sourer; superl. Sourest.] [OE.
sour, sur, AS. s?r; akin to D. zuur, G. sauer, OHG. s?r,
Icel. s?rr, 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.
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All sour things, as vinegar, provoke appetite.
--Bacon.
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2. Changed, as by keeping, so as to be acid, rancid, or
musty, turned.
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3. Disagreeable; unpleasant; hence; cross; crabbed; peevish;
morose; as, a man of a sour temper; a sour reply. "A sour
countenance." --Swift.
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He was a scholar . . .
Lofty and sour to them that loved him not,
But to those men that sought him sweet as summer.
--Shak.
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4. Afflictive; painful. "Sour adversity." --Shak.
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5. Cold and unproductive; as, sour land; a sour marsh.
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Sour dock (Bot.), sorrel.
Sour gourd (Bot.), the gourdlike fruit Adansonia
Gregorii, and Adansonia digitata; also, either of the
trees bearing this fruit. See Adansonia.
Sour grapes. See under Grape.
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.
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Syn: Acid; sharp; tart; acetous; acetose; harsh; acrimonious;
crabbed; currish; peevish.
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From The Collaborative International Dictionary of English v.0.48:
Sour \Sour\, n.
A sour or acid substance; whatever produces a painful effect.
--Spenser.
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From The Collaborative International Dictionary of English v.0.48:
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.
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They keep out melancholy from the virtuous, and hinder
the hatred of vice from souring into severity.
--Addison.
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