downbeat /daʊnˈbiːt/adjective 2/ˈdaʊnbiːt/ noun 1forms 3 adjective2 •Sad or pessimistic.He sounded downbeat when asked about his future plans. •Cautiously optimistic.She carried herself with a quiet downbeat grace. downbeat /ˈdaʊnbiːt/ noun1 •The accented beat at the beginning of a bar (indicated by a conductor with a downward stroke). formsdownbeats · more downbeat · most downbeat