zone out

phrasal verb·1 sense·particle out

Usefulness

Meanings

1

Stop paying attention because you are tired or distracted

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

I zoned out during the lecture.
I stopped paying attention during the lecture.
Sam zoned out on the bus.
Sam stopped paying attention to what was happening on the bus.

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I zoned out during the lecture. What does it mean?

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