p.pr. & ·vb.n. of flash.
2. flashing ·noun a mode of covering transparent white glass with a film of colored glass.
3. flashing ·noun the creation of an artifical flood by the sudden letting in of a body of water;
called also flushing.
4. flashing ·noun 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.
5. flashing ·noun 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.