Warning synonyms, warning pronunciation, warning translation, english dictionary definition of warning. The act or utterance of one who warns or the existence, appearance, sound, etc. , of a thing that warns. See examples of warning used in a sentence. How to use warning in a sentence. The meaning of warning is the act of warning : A warning is an advance notice of something that will happen, often something unpleasant or dangerous. The action of the verb warn; The state of being warned. An instance of warning someone. This dictionary definitions page includes all the possible meanings, example usage and translations of the word warning. Message intended to inform of danger. What does warning mean? The soldiers opened fire without warning. A warning is something that makes us aware of possible danger. The government issued a warning about. There are a number of ways of warning someone. Something spoken or written that is intended to warn. Check meanings, examples, usage tips, pronunciation, domains, and related words. Discover expressions like red flag warning, serve as a warning, warning signal. Warnings can be weak or strong. A statement telling of or an indication providing evidence of impending danger, difficulty, or misfortune: