a. rare. [f. FLASH sb. + -FUL.] Full of flashes.

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1890.  W. C. Russell, Ocean Trag., III. xxxi. 154. The sun sank and the darkness of the evening swept over the sea as swiftly as the shadow of a storm, but it proved a glorious dusk, fine, clear, glittering though dark, the sky like cloth of silver, flashful in places with a view of the cross of the southern hemisphere low down to make one contrast this heat and stillness and placid grandeur of constellations with the roaring of Cape Horn and the rush of the mountain-high surge, down upon which that divinely planted symbol was gazing with trembling eyes.

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1891.  W. C. Russell, My Danish Sweetheart, III. vi. 172. A strange, gloomy huddle of discoloured countenances flashful with eyes, and of many expressions.

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