an event regarded as a portent of good or evil 征兆 the ghost's appearance was an ill omen. 鬼的出现是不好的征兆。 a rise in imports might be an omen of recovery. 进口的增加可能是恢复的征兆。 ■[mass noun]prophetic significance 预兆 the raven seemed a bird of evil omen. 乌鸦似乎是一种预兆凶险的鸟。