certificate confirming compliance with proper health standards (esp. as given to a ship captain to present to the port authorities at the next port); (figurative) official authorization that one is innocent and has fulfilled a certain duty properly (i.e. clean bill of health)
BILL OF HEALTH
Meaning of BILL OF HEALTH in English
Explanatory English dictionary bed edition. Толковый словарь английского языка Редакция bed. 2012