Plural for something that warns of imminent risk or danger

Plural for the moment when a country or a society realizes that it needs to catch up with apparent technological and scientific developments made by some other country or countries by increasing its investment into education, innovative research and development, etc.

Plural for a sign or piece of information that indicates something

Plural for a warning, typically in the form of an allegorical story

Plural for something regarded as an indication of what is going to happen

Plural for a lesson that has been learned through experience

Plural for a feeling that something, often of an undesirable nature, is about to happen