Trench warfare definition

noun

(1) A type of armed combat in which the opposing troops fight from trenches that face each other

"Instead of the war ending quickly, it became bogged down in trench warfare"

(2) A struggle (usually prolonged) between competing entities in which neither side is able to win

"The hope that his superior campaigning skills would make a difference evaporated in the realization that electioneering had become a form of trench warfare"