Wiktionary
close out
vb. (context transitive English) to terminate; to call the end of.
WordNet
Usage examples of "close out".
He stopped and covered his ears to close out the cry of his firstborn.
Simon screwed his fingers into his ears to close out that sultry heat which seeped from words in the air to the racing blood in his own body.
I want to close out convenience and consumer manufacturing and keep it closed until we can afford it.
And this narrow economic definition failed to consider that some cultural contributions aren't possible until enough years and experiences are stacked up in a lifetime to begin great works rather than close out the books on them.