Diagnosis meaning: Diagnosis (of something) the act of

diagnosis (of something) the act of discovering or identifying the exact cause of an illness or a problem. They are waiting for the doctor's diagnosis. An accurate diagnosis was made after a series of tests. They are using new methods of diagnosis. diagnosis meaning, definition, what is diagnosis: the process of discovering exactly what ...: Learn more. The meaning of DIAGNOSIS is the art or act of identifying a disease from its signs and symptoms. How to use diagnosis in a sentence. Diagnosis, the process of determining the nature of a disease or disorder and distinguishing it from other possible conditions. The term comes from the Greek gnosis, meaning knowledge.