di·ag·nose 
/ˈdajəgˌnoʊs/ verb
di·ag·nos·es; di·ag·nosed; di·ag·nos·ing /ˈdajəgˌnoʊs/ verb [+ obj] 1 a : to recognize (a disease, illness, etc.) by examining someone
▪ The test is used to help in diagnosing heart disease. ▪ Thousands of new cases have been diagnosed in the past year. ▪ The doctor was unable to diagnose the skin condition. — often + as ▪ The tumor was diagnosed as benign. ▪ Her illness was incorrectly diagnosed as a bacterial infection.
b : to recognize a disease, illness, etc., in (someone)
▪ a new doctor with little experience diagnosing patients ▪ She was diagnosed as having cancer. = She was diagnosed with cancer. 2 : to find the cause of (a problem)
▪ The mechanic was unable to diagnose the problem. — often + as ▪ The mechanic diagnosed the problem as a faulty spark plug.
▪ The test is used to help in diagnosing heart disease. ▪ Thousands of new cases have been diagnosed in the past year. ▪ The doctor was unable to diagnose the skin condition. — often + as ▪ The tumor was diagnosed as benign. ▪ Her illness was incorrectly diagnosed as a bacterial infection.
b : to recognize a disease, illness, etc., in (someone)
▪ a new doctor with little experience diagnosing patients ▪ She was diagnosed as having cancer. = She was diagnosed with cancer.
▪ The mechanic was unable to diagnose the problem. — often + as ▪ The mechanic diagnosed the problem as a faulty spark plug.
