a statement or event that indicates a possible or impending danger, problem, or other unpleasant situation 警告;警报 police issued a warning about fake £20 notes. 警方发出有关20英镑假钞的警告。 [mass noun]suddenly and without any warning, the army opened fire. 没有任何警告,军队突然就开火了。 [as modifier]a red warning light. 红色警示灯。 ■[mass noun]cautionary advice 告诫 a word of warning—don't park illegally. 提醒一句——不要违法停车。 ■[mass noun]advance notice of something 预告;通知 she had only had four days' warning before leaving Berlin. 在离开柏林的前四天她才得到通知。 ■an experience or sight that serves as a cautionary example to others 鉴戒,前车之鉴 his sad death should be a warning to everyone. 他的不幸亡故对每个人来说都应该是个鉴戒。