Source : Webster's Revised Unabridged Dictionary (1913)

Chlorinate \Chlo"rin*ate\, v. t. [imp. & p. p. {Chlorinated}; p.
   pr. & vb. n. {Chlorinating}.] (Chem.)
   To treat, or cause to combine, with chlorine.

Source : WordNet®

chlorinate
     v 1: treat or combine with chlorine; "chlorinated water"
     2: disinfect with chlorine; "chlorinate a pool"