1. phrasal verb
About the time the three climbers were halfway down, clouds blotted out the sun.
...the victim, whose face was blotted out by a camera blur.
...with mist blotting everything out except the endless black of the spruce on either
2. phrasal verb
Are you saying that she's trying to blot out all memory of the incident?
The boy has gaps in his mind about it. He is blotting certain things out.
She has suffered an extremely unhappy childhood, but simply blotted it out of her
COBUILD Advanced English Dictionary. Copyright © HarperCollins Publishers