'Souring' definitions:

Definition of 'souring'

From: WordNet
noun
The process of becoming sour

Definition of 'Souring'

From: GCIDE
  • Souring \Sour"ing\, n. (Bot.) Any sour apple. [1913 Webster]

Definition of 'Souring'

From: GCIDE
  • Sour \Sour\, v. i. [imp. & p. p. Soured; p. pr. & vb. n. Souring.] To become sour; to turn from sweet to sour; as, milk soon sours in hot weather; a kind temper sometimes sours in adversity. [1913 Webster]
  • They keep out melancholy from the virtuous, and hinder the hatred of vice from souring into severity. --Addison. [1913 Webster]