1. silviculture to raise mounds in potentially wet areas with a plow during site preparation on which seedlings are planted 2. soil engineering to drain or irrigate the ground surface by constructing narrow-width plowlines in which the furrows run parallel to the prevailing land slope —synonym crowning, ridging 3. engineering to lay a drain or conduit in a trench and tamp the earth around it 4. geology the arrangement of sediment and sedimentary rock in layers or strata more than 1 cm (0.39 in) thick —see bedThis definition last updated 10/24/2008