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The Collaborative International Dictionary of English v.0.48 (gcide)

Flash \Flash\ (fl[a^]sh), v. i. [imp. & p. p. {Flashed}
(fl[a^]sht); p. pr. & vb. n. {Flashing}.] [Cf. OE. flaskien,
vlaskien to pour, sprinkle, dial. Sw. flasa to blaze, E.
flush, flare.]
1. To burst or break forth with a sudden and transient flood
of flame and light; as, the lighting flashes vividly; the
powder flashed.
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2. To break forth, as a sudden flood of light; to burst
instantly and brightly on the sight; to show a momentary
brilliancy; to come or pass like a flash.
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Names which have flashed and thundered as the watch
words of unnumbered struggles. --Talfourd.
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The object is made to flash upon the eye of the
mind. --M. Arnold.
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A thought flashed through me, which I clothed in
act. --Tennyson.
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3. To burst forth like a sudden flame; to break out
violently; to rush hastily.
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Every hour
He flashes into one gross crime or other. --Shak.
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{flash in the pan}, a failure or a poor performance,
especially after a normal or auspicious start; also, a
person whose initial performance appears augur success but
who fails to achieve anything notable. From 4th {pan}, n.,
sense 3 -- part of a flintlock. Occasionally, the powder
in the pan of a flintlock would flash without conveying
the fire to the charge, and the ball would fail to be
discharged. Thus, a good or even spectacular beginning
that eventually achieves little came to be called a flash
in the pan.

{To flash in the pan}, to fail of success, especially after a
normal or auspicious start. [Colloq.] See under {Flash}, a
burst of light. --Bartlett.
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Syn: {Flash}, {Glitter}, {Gleam}, {Glisten}, {Glister}.

Usage: Flash differs from glitter and gleam, denoting a flood
or wide extent of light. The latter words may express
the issuing of light from a small object, or from a
pencil of rays. Flash differs from other words, also,
in denoting suddenness of appearance and
disappearance. Flashing differs from exploding or
disploding in not being accompanied with a loud
report. To glisten, or glister, is to shine with a
soft and fitful luster, as eyes suffused with tears,
or flowers wet with dew.
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Flashing \Flash"ing\, n.
1. (Engineering) The creation of an artificial flood by the
sudden letting in of a body of water; -- called also
{flushing}.
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2. (Arch.) 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}.
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3. (Glass Making)
(a) 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.
(b) A mode of covering transparent white glass with a film
of colored glass. --Knight.
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{Flashing point} (Chem.), that degree of temperature at which
a volatile oil gives off vapor in sufficient quantity to
burn, or flash, on the approach of a flame, used as a test
of the comparative safety of oils, esp. kerosene; a
flashing point of 100[deg] F. is regarded as a fairly safe
standard. The burning point of the oil is usually from ten
to thirty degree above the flashing point of its vapor.
Usually called {flash point}.
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