Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
spaced-out is an adjective meaning "stupefied by (or as if by) some narcotic drug". It carries 2 recorded senses.
stupefied by (or as if by) some narcotic drug
confused or disoriented as if intoxicated through taking a drug
Definitions, synonyms and semantic relations for spaced-out come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.