to recognize and name the exact character of a disease or a problem, by examining it

The specialist diagnosed cancer. 那位专家作出的诊断是癌症。

be diagnosed as His condition was diagnosed as some type of blood disorder. 他的病被诊断为某种血液病。

be diagnosed with She was diagnosed with/as having diabetes. 她被查出患有糖尿病。

The electrician has diagnosed a fault in the wiring. 电工查出了一处线路故障。