Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
air-conditioner is a noun meaning "an appliance designed to extract humidity from the air and thereby cool it". It carries one recorded sense.
an appliance designed to extract humidity from the air and thereby cool it
“we rarely turn on the air-conditioner”
Definitions, synonyms and semantic relations for air-conditioner come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.