Sour

1. To macerate, and render fit for plaster or mortar; as, to sour lime for business purposes.
2. To cause or permit to become harsh or unkindly.
3. A sour or acid substance; whatever produces a painful effect.
4. Afflictive; painful.
5. To cause to become sour; to cause to turn from sweet to sour; as, exposure to the air sours many substances.
6. Having an acid or sharp, biting taste, like vinegar, and the juices of most unripe fruits; acid; tart.
7. To become sour; to turn from sweet to sour; as, milk soon sours in hot weather; a kind temper sometimes sours in adversity.
8. Cold and unproductive; as, sour land; a sour marsh.
9. To make unhappy, uneasy, or less agreeable.
10. To make cold and unproductive, as soil.
11. Changed, as by keeping, so as to be acid, rancid, or musty, turned.
12. Disagreeable; unpleasant; hence; cross; crabbed; peevish; morose; as, a man of a sour temper; a sour reply.