cleanout

[kleen-out]
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noun

an act of cleaning out.
an opening or passage giving access to a place that requires occasional cleaning, as a soil pipe.

Origin of cleanout

1885–90, Americanism; noun use of verb phrase clean out
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for cleanout

Historical Examples of cleanout