doldrum UK /ˈdɒldɹəm/US /ˈdɑldɹəm/adjective 1noun 1forms 3 adjective1 •Boring, uninteresting.She quit her doldrum job and left to seek a life of adventure. noun1 •(slang, no longer used) A slothful or stupid person. formsdoldrums · more doldrum · most doldrum