/ Dictionary / Index T trench warfare: Meaning and Definition of Find definitions for: trench' war'fare Pronunciation: [key] combat in which each side occupies a system of protective trenches. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. trench mouth trend Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language