FLASH n.
A reservoir and sluiceway beside a navigable stream, just above a shoal, so that the stream may pour in water as boats pass, and thus bear them over the shoal. Flash wheel (Mech.), a paddle wheel made to revolve in a breast or curved water way, by which water is lifted from the lower to the higher level.…
FLEET n. 2 definitions
A former prison in London, which originally stood near a stream, the Fleet (now filled up). Fleet parson, a clergyman of low character, in, or in the vicinity of, the Fleet prison, who was ready to unite persons in marriage (called Fleet marriage) at any hour, without public notice, witnesses, or consent of parents.…