Wiktionary
vb. (context intransitive idiomatic English) To become blank.
WordNet
v. be unable to remember; "I'm drawing a blank"; "You are blocking the name of your first wife!" [syn: forget, block, draw a blank] [ant: remember]
cut out, as for political reasons; "several line in the report were blanked out"
Usage examples of "blank out".
The bioware node spliced into his cortex which regulated his gland was also programmed to blank out nervous impulses above a predetermined pain level.
Furious now at her own forgetfulness, she headed for it, turned back to blank out the windows-that sniper was too damned trigger-happy for comfort and might well fire on the reflection from the screen even if she turned it away from the window-and traced the cord along the floor until she found the leech.
Or he'll blank out on someone altogether, maybe someone he's known all his life.
He waved it at Hallahan, a little of the whiskey splashed, and Hallahan cursed and moved a report blank out of danger.
She was quite normal earlier, then she suddenly snapped off, you know the way she does that blank out.
If he could blank out on the interesting thoughts he ought to be able to blank out on the awful ones, oughtn't he?
If he could blank out on the interesting thoughts he ought to be able to blank out on the awful ones, oughtn’.
The adjacent observation booth would have passed, with its lights on to blank out the scene through the one-way mirror, as unused storage space, but the inspectors did not notice it at all.