Definition of reflash:
(v) :
(intransitive, of a fire) To burst back into flame after being extinguished and then receiving a large amount of oxygen.
(n) :
The situation where a fire bursts back into flame after being extinguished and then receiving a large amount of oxygen.
(v) :
(transitive, computing) To flash again; to overwrite the memory of an updatable component such as a BIOS chip.