Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
chalons is a noun meaning "the battle in which Attila the Hun was defeated by the Romans and Visigoths in 451". It carries one recorded sense.
the battle in which Attila the Hun was defeated by the Romans and Visigoths in 451
France
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 chalons come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.