Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of underdrain is as below...

Underdrain :: Underdrain (n.) An underground drain or trench with openings through which the water may percolate from the soil or ground above.

Underdrain :: Underdrain (v. t.) To drain by forming an underdrain or underdrains in; as, to underdrain land..

Underditch :: Underditch (v. t.) To dig an underground ditches in, so as to drain the surface; to underdrain; as, to underditch a field or a farm..

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