Definitions

1. noun

A nonmetallic element that is highly reactive and is found in group 17 of the periodic table, such as chlorine, fluorine, or iodine.

“The halogen in the compound produced a strong odor.”

2. verb

To treat or expose (a substance) to a halogen, especially chlorine or fluorine, typically in order to disinfect or sterilize it.

“The water supply was halogenated to kill off bacteria.”