'Underdrain' definitions:

Definition of 'Underdrain'

From: GCIDE
  • Underdrain \Un"der*drain`\, n. An underground drain or trench with openings through which the water may percolate from the soil or ground above. [1913 Webster]

Definition of 'Underdrain'

From: GCIDE
  • Underdrain \Un`der*drain"\, v. t. To drain by forming an underdrain or underdrains in; as, to underdrain land. [1913 Webster]