Definitions for "Oceanic trench"
Deep, steep-sided depression in the ocean floor, formed when one plate of the earth's crust is pushed beneath another plate.
Narrow, deep depression in the seafloor representing the line of subduction of an oceanic lithospheric plate beneath the margin of a continental lithospheric plate; often associated with an island arc.
Also called a deep-sea trench, which is a long and narrow depression along the ocean bottom that can exceed 1 000 m in depth (maximum oceanic depths from approximately 7 300 to more than 11 000 m [24 000 to 36 000 feet]).