Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
phase-out is a noun meaning "the act or instance of a planned discontinuation". It carries one recorded sense.
the act or instance of a planned discontinuation
Definitions, synonyms and semantic relations for phase-out come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.