acidity Meaning, Definition & Usage

  1. noun the property of being acidic
    sour; sourness.
  2. noun the taste experience when something acidic is taken into the mouth
    acidulousness.
  3. noun pH values below 7

WordNet

A*cid"i*ty noun
Etymology
L. acidites, fr. acidus: cf. F. acidité. See Acid.
Definitions
  1. The quality of being sour; sourness; tartness; sharpness to the taste; as, the acidity of lemon juice.

Webster 1913