Noun
A sign that indicates a danger, for example to vehicles on a road or of hazardous chemicals.
(figuratively) An indication that someone or something is in danger or at risk
Source: en.wiktionary.orgAccording to the tradition, he felt his defeat at Varna was a warning sign from God (since he declared war on a false pretext, violating the truce with the Ottoman Turks). Source: Internet
A clean break with volume would do the trick for a long term bull run however if a break lacks volume, it could be a warning sign of a bull trap. Source: Internet
A curved penis can be a warning sign of cancer. Source: Internet
Hilton, Woodside and Stockethill councillor Freddie John has welcomed the installation of a new vehicle-activated speed warning sign on Hilton Drive. Source: Internet
A safety warning sign will be posted at closed locations to further alert the public of the closures. Source: Internet
But the numbers also come with a warning sign. Source: Internet