diagnose - definition and synonyms

verb [transitive] 

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present tense
present participlediagnosing
past tensediagnosed
past participlediagnosed
  1. 1
    to find out what physical or mental problem someone has by examining them
    diagnose someone with something:

    When Eva was first diagnosed with cancer she was twenty.

    diagnose someone/something as something:

    A psychiatrist diagnosed her as severely depressed.

  2. 2
    to find out why something such as a piece of equipment or software is not working