v. di·ag·nosed, di·ag·nos·ing, di·ag·nos·es v.tr. 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. 3. To analyze the nature or cause of: diagnose the reasons for an economic downturn. v.intr. To make a diagnosis. [Back-formation from DIAGNOSIS.] di′ag·nosa·ble adj. |
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