Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
off-and-on is an adjective meaning "intermittently stopping and starting". It carries one recorded sense.
intermittently stopping and starting
“fitful (or interrupted) sleep”
“off-and-on static”
Definitions, synonyms and semantic relations for off-and-on come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.