Definition of downcome:
(n) :
A tumbling or falling down; a sudden or heavy fall; an overthrow; ruin; destruction.
(n) :
A downpour of rain.
(n) :
In ironmaking, a pipe that leads combustible gases downward from the top of the blast furnace to the hot-blast stoves, boilers, etc., where they are burned.
(v) :
To come down; fall down; come or fall apart.