oversour

comparative more oversour · superlative most oversour

1. Overly or excessively sour; too sour.

   Let milk become oversour and observe odors of decomposition.

   1903, Monthly Bulletin, volumes 3-4, page 24

present singular third person oversours · participle present oversouring · participle past oversoured · past oversoured

1. intransitiveTo become too sour.

   On warm days the milk might oversour, while on cooler days it would be found comparatively sweet unless a good deal of attention was given to keeping the temperature where it would sour in the proper length of time.

   1914, John Michels, Creamery Butter-making, page 85