1 [U] the state of being ill 患病；不适: A lot of workers are absent because of sickness. 许多工人因病缺勤。

2 [U] a feeling in your stomach that may make you bring up food through your mouth 恶心: Symptoms of the disease include sickness and diarrhoea. 那种疾病的症状包括上吐下泻。

3 [C,U] a particular type of illness 病；疾病: pills for seasickness 晕船药丸 ☞Look at sleeping sickness. 参看sleeping sickness。