1. To distinguish or identify (a disease, for example) by diagnosis. 2. To identify (a person) as having a particular disease or condition by means of a diagnosis.

What does it mean when someone is diagnosed?

If someone or something is diagnosed as having a particular illness or problem, their illness or problem is identified. If an illness or problem is diagnosed, it is identified.

What qualifies something as a diagnosis?

English Language Learners Definition of diagnosis

: the act of identifying a disease, illness, or problem by examining someone or something. : a statement or conclusion that describes the reason for a disease, illness, or problem.