Definition of trench warfare
: warfare in which the opposing forces attack and counterattack from a relatively permanent system of trenches protected by barbed-wire entanglements
First Known Use of trench warfare
Learn More about trench warfare
Britannica.com: Encyclopedia article about trench warfare
Seen and Heard
What made you want to look up trench warfare? Please tell us where you read or heard it (including the quote, if possible).