1. Noun.  The quality or state of being acid.
  2. Noun.  The quality of sour; sourness; tartness; sharpness to the taste, as in the '''acidity''' of lemon juice.
  3. Noun.  (pathology) Excessive acid quality, as in gastric secretions.

This is an unmodified, but possibly outdated, definition from Wiktionary and used here under the Creative Commons license. Wiktionary is a great resource. If you like it too, please donate to Wikimedia.

This entry was last updated on RefTopia from its source on 3/20/2012.