as in to accumulate
to gradually form into a layer, pile, or mass those newspapers have been stacking up in the basement since we moved here

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Cite this Entry

“Stack (up).” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/stack%20%28up%29. Accessed 2 Dec. 2022.

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