board up
Verb
Meaning
cover with wooden boards
Source: WordNetSynonyms
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Examples
Whenever you see a board up with "Trespassers will be prosecuted," trespass at once.
I've been on a show before where I was on a billboard and then, after like three or four weeks, they took the billboard down and replaced it with nothing. Took my face down and put a white board up.
board up windows before the hurricane