souring Meaning, Definition & Usage

1. noun the process of becoming sour
   
2. verb go sour or spoil
   ferment; turn; sour; work.
   
   • The milk has soured
   • The wine worked
   • The cream has turned--we have to throw it out
3. verb make sour or more sour
   acidify; sour; acetify; acidulate.
   

WordNet