Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
chlorination is a noun meaning "the addition or substitution of chlorine in organic compounds". It carries 2 recorded senses.
the addition or substitution of chlorine in organic compounds
disinfection of water by the addition of small amounts of chlorine or a chlorine compound
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for chlorination come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.