block out

phrasal verb·1 sense·particle out

Meanings

1

Stop light, noise, or a thought from reaching you

Why “out”? Out can mean away from sight, people, or access. You cannot see it, reach it, or join it.

The curtains blocked out the sun.
The curtains stopped the sun from reaching the room.
Headphones blocked out the noise.
Headphones stopped the noise from reaching him.

Don't confuse with

block outblock off

Block out means stop light, noise, or a thought from reaching you. Block off means close off an area or route to prevent access.

Test yourself

The curtains blocked out the sun. What does it mean?

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