Meaning of downcast

(adj) directed downward; "a downcast glance"

filled with melancholy and despondency; "gloomy at the thought of what he had to face"; "gloomy predictions"; "a gloomy silence"; "took a grim view of the economy"; "the darkening mood"; "lonely and blue in a strange city"; "depressed by the loss of his job"; "a dispirited and resigned expression on her face"; "downcast after his defeat"; "feeling discouraged and downhearted"

(noun) a ventilation shaft through which air enters a mine