What is "downcasted"

Usage examples of "downcasted".

Moving closer to the pane, so that his face's transparent image fills the glass and he can now see clearly beyond it, Lucien sees that what it is is it's a different figure in a different wheelchair from the one before, this new figure's face also downcasted and queerly masked, laboring around the sidewalk's jagged holes.

It was dark inside the plane an I begun to feel terribly alone an downcasted, when all of a sudden I look over at the seat across the aisle, an there is Jenny, just settin there, lookin at me!