Having a dreamy or absent-minded quality; appearing to be lost in thought or distracted. After staying up all night studying, she felt spacey and couldn't focus on the lecture.
Relating to or characteristic of outer space; having a futuristic or otherworldly quality. The band's new album has a spacey sound, with lots of electronic effects and ambient noise.
Feeling dizzy, light-headed, or mildly disoriented, often as a result of drugs, illness, or fatigue. The cold medicine made him feel spacey and disconnected from his surroundings.