1. to determine the identity of (a disease, illness, etc.) by a medical examination: The doctor diagnosed the illness as influenza.
2. to ascertain the cause or nature of (a disorder, malfunction, problem, etc.) from the symptoms: The mechanic diagnosed the trouble that caused the engine knock.
3. to classify or determine on the basis of scientific examination. verb (used without object), diagnosed, diagnosing.
4. to make a diagnosis.
"disorders can be underdiagnosed."
This list can help you learn new vocabulary more quickly and be able explore other words more easily.