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banner cloud

American

noun

Meteorology.

a plume-shaped cloud extending downwind from an isolated mountain peak.

Etymology

Origin of banner cloud

First recorded in 1905–10

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.