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Meaning of clean bill of health

clean' bill' of health'

Pronunciation: [key]
  1. a certificate of health attesting the lack of a contagious disease, as on a ship.
  2. an assurance, as by a doctor, that one is in good health.
  3. an assurance, esp. an official verdict by a committee, that a group or an individual has proved, under investigation, to be morally sound, fit for office, etc.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.