alarm warning device alarm system | a device that signals the occurrence of some undesirable event |
early warning radar | a radar that is part of an early warning system |
early warning system | a network of radar installations designed to detect enemy missiles or aircraft while there is still time to intercept them |
tocsin warning bell | a bell used to sound an alarm |
aposematic coloration warning coloration | conspicuous coloration or markings of an animal serving to warn off predators, a skunk's aposematic coloration |
admonition monition warning word of advice | cautionary advice about something imminent (especially imminent danger or other unpleasantness), a letter of admonition about the dangers of immorality, the warning was to beware of surprises, his final word of advice was not to play with matches |
alarm alert warning signal alarum | an automatic signal (usually a sound) warning of danger |
red light warning light | a cautionary sign of danger |
warning | notification of something, usually in advance, they gave little warning of their arrival, she had only had four days' warning before leaving Berlin |
warning | a message informing of danger, a warning that still more bombs could explode |
strategic warning | (military) a warning prior to the start of a threatening act |
tactical warning | (military) a warning after the initiation of a hostile act |
warning of attack | a warning to national policy makers that an enemy intends to launch an attack in the near future |
warning of war | a warning to national policy makers that an enemy intends war or is preparing for war and is on a course that increases the risk of war |
ozone hole | an area of the ozone layer (near the poles) that is seasonally depleted of ozone |
ozone layer ozonosphere | a layer in the stratosphere (at approximatelymiles) that contains a concentration of ozone sufficient to block most ultraviolet radiation from the sun |
ozone sickness | illness that can occur to persons exposed to ozone in high-altitude aircraft, characterized by sleepiness and headache and chest pains and itchiness |
ozone | a colorless gas (O) soluble in alkalis and cold water, a strong oxidizing agent, can be produced by electric discharge in oxygen or by the action of ultraviolet radiation on oxygen in the stratosphere (where it acts as a screen for ultraviolet radiation) |
admonitory cautionary exemplary monitory warning(a) | serving to warn, shook a monitory finger at him, an exemplary jail sentence |