space (v.)youdaoicibaDictYouDict[space 词源字典]
1540s, "to make of a certain extent;" 1680s in typography; 1703 as "to arrange at set intervals," from space (n.). Meaning "to be in a state of drug-induced euphoria" is recorded from 1968. Space cadet "eccentric person disconnected with reality" (often implying an intimacy with hallucinogenic drugs) is a 1960s phrase, probably traceable to 1950s U.S. sci-fi television program "Tom Corbett, Space Cadet," which was watched by many children who dreamed of growing up to be one and succeeded. Related: Spaced; spacing.[space etymology, space origin, 英语词源]
spacy (adj.)youdaoicibaDictYouDict
also spacey, 1852, "large, roomy, spacious," from space (n.) + -y (2). Meaning "felt as characteristic of outer space" (especially with reference to electronic music) is attested from 1971, probably influenced by spaced-out (1965, American English slang), a reference to the behavior of people using hallucinogenic drugs (see space (v.)).