space out

phrasal verb·1 sense·particle out

Usefulness

Meanings

1

Lose focus and start daydreaming

Losing Awarenessamerican Englishinformal

Why “out”? Awareness is like a lamp. For a time the light is gone: a person faints, or attention and memory fade.

Sorry, I spaced out for a minute.
Sorry, I stopped focusing and began daydreaming for a minute.
She spaced out in the middle of the meeting.
She stopped focusing and began daydreaming during the meeting.

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