1 of 2


: a concealed drain with openings through which the water enters when the water table reaches the level of the drain
an underdrain below a filter bed


2 of 2

transitive verb

: to drain by forming an underdrain
underdrain a meadow

Word History



under entry 3 + drain

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Dictionary Entries Near underdrain

Cite this Entry

“Underdrain.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/underdrain. Accessed 16 Jun. 2024.

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