warning

A statement telling of or an indication providing evidence of impending danger, difficulty, or misfortune.

Advice to be cautious.

A cautionary or deterrent example.

Acting or serving to warn.

In biology, serving as a menace to enemies; of threatening aspect: somewhat specially used of a strikingly conspicuous coloration. See the quotation.

Notice beforehand of the consequences that will probably follow continuance in some particular course; admonitory advice to do or to abstain from doing something, as in reference to approaching a probable danger.

That which warns, or serves to warn or admonish.

Heed; the lesson taught by or to be learned from a caution given.

Previous notice: as, a short warning.

A summons; a call; a bidding.