making known, informing - a speech act that conveys information

wake-up call - a warning to take action concerning something that was overlooked or neglected; "the bombing was a wake-up call to strengthene domestic security"

alarmism - needless warnings

alert, alerting - a warning serves to make you more alert to danger

caveat, caution - a warning against certain acts; "a caveat against unfair practices"

false alarm - a warning that is given about something that fails to occur

forewarning, premonition - an early warning about a future event

strategic warning - (miliatry) a warning prior to the start of a threatening act

tactical warning - (military) a warning after the initiation of a hostile act

threat - a warning that something unpleasant is imminent; "they were under threat of arrest"

advice - a proposal for an appropriate course of action

deterrent example, object lesson, lesson, example - punishment intended as a warning to others; "they decided to make an example of him"

dissuasive - deterring from action; "dissuasive advice"; "made a slight dissuasive gesture with her hand"