gloomy /ˈɡluːmi/adjective 2noun 1forms 3 adjective2 •Not very illuminated; dim because of darkness, especially when appearing depressing or frightening.The cavern was gloomy. •Suffering from gloom; melancholy; dejected.The report was slightly gloomier than in June, when unemployment rates eased in more than half of all U.S. states for a third straight month and only five states reported jobless rate increases. — 2010 noun1 •(informal) Someone or something that is gloomy or pessimistic. formsgloomies · gloomier · gloomiest