of Flash

The creation of an artifical flood by the sudden letting
in of a body of water; – called also flushing.

Pieces of metal, built into the joints of a wall, so as
to lap over the edge of the gutters or to cover the edge of the
roofing; also, similar pieces used to cover the valleys of roofs of
slate, shingles, or the like. By extension, the metal covering of
ridges and hips of roofs; also, in the United States, the protecting of
angles and breaks in walls of frame houses with waterproof material,
tarred paper, or the like. Cf. Filleting.

The reheating of an article at the furnace aperture
during manufacture to restore its plastic condition; esp., the
reheating of a globe of crown glass to allow it to assume a flat shape
as it is rotated.