Webster’s Revised Unabridged Dictionary · 1913
Warning
Warn′ing, a. Giving previous notice; cautioning; admonishing; as, a warning voice.
That warning timepiece never ceased. Longfellow.
Warning piece, Warning wheel (Horol.), a piece or wheel which produces a sound shortly before the clock strikes.
Warn′ing, n. 1. Previous notice. "At a month's warning." Dryden.
A great journey to take upon so short a warning. L'Estrange.
2. Caution against danger, or against faults or evil practices which incur danger; admonition; monition.
Could warning make the world more just or wise. Dryden.