Undrain
noun, verb
noun, verb ·Rare ·Advanced level
Definitions
Noun
- 1 A water collection system that drains water away from a location.
"The experiments with fresh and septic sludge show that for filters of the same size material, fresh sludge passes through into the undrains while septic sludge merely gives up its water."
Verb
- 1 To restore that which has drained away.
"The probable differences between gross and net drain also require an explanation of why some manpower "undrains" by returning home after a period of working in the United States."
Example
More examples"The probable differences between gross and net drain also require an explanation of why some manpower "undrains" by returning home after a period of working in the United States."
Etymology
From un- + drain.
More for "undrain"
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.