Definition & Meaning of "spaced out"in English

What does "spaced out" mean in drug slang?

The term "spaced out" means being mentally detached, dazed, or disconnected from one's surroundings, often due to drug intoxication, but also sometimes from fatigue or distraction. The structure is informal slang where "space" metaphorically refers to a distant or absent mental state, and "out" emphasizes disconnection. It is commonly used in casual speech and drug-related contexts to describe reduced awareness or focus.