say it: SPAY-see
spacey is an adjective meaning "stupefied by (or as if by) some narcotic drug". It is pronounced /ˈspeɪsi/ — SPAY-see. It carries one recorded sense.
stupefied by (or as if by) some narcotic drug
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 spacey come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.