| 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. | Also, clean bill. 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. |
To “get a clean bill of health” is to be told by some authoritative source, generally a doctor, that one is perfectly healthy. The phrase is sometimes used figuratively to indicate that a person or organization has been found free of any sort of irregularity: “After looking into her financial background, the Senate gave the nominee a clean bill of health.”