Oxford Dictionary English trench coat noun noun BrE BrE//ˈtrentʃ kəʊt// ; NAmE NAmE//ˈtrentʃ koʊt// Add to my wordlistjump to other results a long loose coat, worn especially to keep off rain, with a belt and pockets in the style of a military coatSee trench coat in the Oxford Advanced American DictionaryCheck pronunciation: trench coat oxfordlearnersdictionaries.com