sickness/ˋsIknIs; ˈsIknəs or ˈsIknIs/n [U] 1 when you VOMIT (=bring food up from your stomach through your mouth) [→ morning sickness] 恶心﹔呕吐: sickness and diarrhoea 呕吐和腹泻travel/motion/sea sickness (=caused by travel, movement etc) 旅行眩晕/动晕症/晕船2 the state of being ill [ illness ] 患病: people suffering from radiation sickness 受到辐射而生病的人