- a visual signal, as a flag, giving advance notice of a heavy storm, used especially along coastal areas.
- storm warning(def 2).
Origin of storm signal
First recorded in 1860–65
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for storm signal
The "storm-signal" was hoisted ominously between his eyebrows.Men in War
Synonymous with storm-signal; formerly fire-beacons were used to give warning of the approach of an enemy.The Sailor's Word-Book
William Henry Smyth
And immediately after that a storm-signal showed itself, at the sight of which all the family trembled.The Wife and Other Stories