A trench is a long narrow channel in the ground used by soldiers in order to protect themselves from the enemy. People often refer to the battle grounds of the First World War in Northern France and Belgium as the trenches. We fought with them in the trenches. trench warfare. deep sea trench oceanic trench Mariana Trench trench warfare
A long, narrow excavation dug through overburden, or blasted out of rock, to expose a vein or ore structure
To dig or cultivate very deeply, usually by digging parallel contiguous trenches in succession, filling each from the next; as, to trench a garden for certain crops
a ditch dug as a fortification having a parapet of the excavated earth any long ditch cut in the ground a long steep-sided depression in the ocean floor dig a trench or trenches; "The National Guardsmen were sent out to trench"
a narrow, elongate depression of the deep-sea floor, having steep sides and oriented parallel to the trend of an adjacent continent It lies between the continental margin and the abyssal plain Usually it forms the surficial trace of a subduction zone