- a person who appears to be in his or her own world or out of touch with reality.
- a person who behaves oddly or seems stupefied or remote because of the influence of drugs; druggie.
Origin of space cadet
1950–55, for sense “spaceman trainee”
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- slang a person who is eccentric or out of touch with reality, as if affected by drugs