'Chlorination' definitions:

Definition of 'chlorination'

From: WordNet
noun
The addition or substitution of chlorine in organic compounds
noun
Disinfection of water by the addition of small amounts of chlorine or a chlorine compound

Definition of 'Chlorination'

From: GCIDE
  • Chlorination \Chlo`ri*na"tion\, n. The act or process of subjecting anything to the action of chlorine; especially, a process for the extraction of gold by exposure of the auriferous material to chlorine gas. [1913 Webster]