trenches /ˈtɹɛnt͡ʃɪz/noun 2phrases 1 noun[plural only]2 •The front line of any field of endeavor, as the line of scrimmage in American football, patrol duty for a policeman.Anderson: We've all reviewed your reports, seen the data you collected, but it's all just theory to us. Anderson: You've been there. In the trenches. Fighting them. You know what they're capable of. — 2012 •(figurative) A difficult or disadvantageous situation; a low point. Phrases with trenches in the trenchesWorking or operating in the most active and difficult parts of a job or business.