v. To treat with, or react with, a halogen or a hydrohalic acid.
The Century Dictionary and Cyclopedia
To introduce a halogen atom into (a compound); especially, to substitute a halogen for hydrogen in an organic compound.
Word Usage
"For that matter, it would have been too late even when the discovery was made and action taken, if the industry had used primarily bromine, rather than chlorine, to halogenate fluorocarbon compounds for market purposes."