The phrase "space out" refers to a state of being unfocused or disconnected from one's surroundings. There are several synonyms for this phrase, such as daydreaming, zoning out, drifting off, and losing concentration. These words all convey a sense of mental disengagement from one's present environment or task. "Dazing off" and "mind wandering" are also commonly used synonyms for "space out." While these phrases may have a negative connotation in some contexts, such as in a classroom or workplace, they can also be used in a positive sense to describe a peaceful state of meditative contemplation or relaxation.