1 [U] the state of being physically or mentally ill （身体或精神）有病: He's missed a lot of school through illness. 他因为生病缺了好多课。There is a history of mental illness in the family. 这个家族有精神病史。

2 [C] a type or period of physical or mental ill health （身体或精神方面的）疾病，患病期间: minor/serious/childhood illnesses 小病；重病；小儿疾病My dad is just getting over his illness. 我的爸爸病后刚刚痊愈。 ☞adjective ill 形容词为ill ☞ Look at the note at disease. 参看disease的注释。