• Webster's Revised Unabridged Dictionary
    • n Williwaw (Naut) A whirlwind, or whirlwind squall, encountered in the Straits of Magellan.
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Century Dictionary and Cyclopedia
    • n williwaw A sudden, violent squall of wind. Also spelled willywaw.
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In literature:

The "williwaw," sometimes called the "wooley," is one of the great terrors of Fuegian inland waters.
"The Land of Fire" by Mayne Reid
A williwaw began in the hills ahead and swept out and set the ship to reeling crazily in its erratic currents.
"Astounding Stories of Super-Science, August 1930" by Various
The crews of sealing vessels call them 'williwaws,' or 'hurricane-squalls,' and they are most violent.
"Narrative of the surveying voyages of His Majesty's ships Adventure and Beagle, between the years 1826 and 1836" by Robert FitzRoy

In news:

Firefighters had to briefly evacuate their position but where able to save the homes along South Williwaw Drive BILL ROTH — Anchorage Daily News Buy Photo.
Late Gore Vidal 's first novel, 'Williwaw,' was set in Alaska.
Eugene Luther Gore Vidal hailed from West Point, N.Y. And first entered the literary scene at the age of 19, when he published the novel "Williwaw".