blot out

phrasal verb·1 sense·particle out

Meanings

1

Cover or hide something so it can no longer be seen

Why “out”? Pushing outward to eliminate. What is removed is sent away.

Clouds blotted out the sun.
Clouds covered the sun so it could no longer be seen.
Thick fog blotted out the road.
Thick fog covered the road so it could no longer be seen.

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Clouds blotted out the sun. What does it mean?

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