TRENCH

[noun] [C] - a narrow channel which is dug into the groundOne of the workmen was killed when the sides of the trench they were working in collapsed.A trench is also a deep channel used by soldiers as a place from which they can attack the enemy while being hidden.the trenches of World War Itrench warfare. Compare foxhole.A trench coat is a long loose coat with a belt, usually made from waterproof material and similar in style to a military coat.See picture: Coats and jackets