poltroon UK /pɒlˈtɹuːn/US /pɑlˈtɹun/adjective 1noun 1forms 3 adjective1 •Cowardly. noun1 •An ignoble or total coward; a dastard; a mean-spirited wretch.Patience is for poltroons, such as he: He durst not sit there, had your father lived. — 1591 formspoltroons · more poltroon · most poltroon