Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Emitting flashes of lightning.
  • adj. Emitting flashes similar to lightning.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Resembling a lightning flash; fulgurant.
  • adj. Full of lightning.

from The Century Dictionary and Cyclopedia

  • Lightning-like; appearing or acting like lightning.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. amazingly impressive; suggestive of the flashing of lightning

Etymologies

Latin fulgur, lightning; see fulgurate + -ous.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin fulgur "lighting". (Wiktionary)

Examples

  • She was tall, dark, sallow, lithe, with a strange moodiness of heart and a recessive, fulgurous gleam in her chestnut-brown, almost brownish-black eyes.

    The Titan

  • "The naturalists say they are generated in the sky by fulgurous exhalation conglobed in a cloud by the circumfused humor."

    The Book of the Damned

  • When it was all over, and the train, bearing the general foreman, had gone, Burke quieted down, but not without many fulgurous flashes that kept the poor Italian on tenterhooks.

    The Mighty Burke

  • This was the theory of the learned Tollius, who in 1649 told the world that these chipped or smoothed stones were "generated in the sky by a fulgurous exhalation conglobed in a cloud by the circumposed humour."

    A History of the warfare of Science with Theology in Christendom

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