- (v.t.) To cause or permit to become harsh or unkindly.
- (superl.) Having an acid or sharp, biting taste, like vinegar, and the juices of most unripe fruits; acid; tart.
- (v.t.) To macerate, and render fit for plaster or mortar; as, to sour lime for business purposes.
- (superl.) Changed, as by keeping, so as to be acid, rancid or musty, turned.
- (v.t.) To cause to become sour; to cause to turn from sweet to sour; as, exposure to the air sours many substances.
- (superl.) Disagreeable; unpleasant; hence; cross; crabbed; peevish; morose; as, a man of a sour temper; a sour reply.
- (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.
- (superl.) Cold and unproductive; as, sour land; a sour marsh.
- (superl.) Afflictive; painful.
- (n.) A sour or acid substance; whatever produces a painful effect.
- (v.t.) To make unhappy, uneasy or less agreeable.
- (v.t.) To make cold and unproductive, as soil.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). Sour. Retrieved September 22, 2026, from http://smartdefine.org/sour/definitions/2064237 |
| Chicago | Webster's. 2011. "Sour" http://smartdefine.org/sour/definitions/2064237 (accessed September 22, 2026). |
| Harvard | Webster's 2011, Sour, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/sour/definitions/2064237>. |
| MLA | Webster's. "Sour" 28 May 2011. Web. 22 September 2026. <http://smartdefine.org/sour/definitions/2064237> |