Definitions of doctrine
(US) an official statement by a government about its plans
US presidents are required by Congress to produce these documents of doctrine every four years.
a principle of law
The former judges claim they cannot be held liable because the legal doctrine of judicial immunity protects them from civil suits stemming from their work.
a set of beliefs that are central to a religion, philosophy or other system of ideas
Official Church doctrine stated that the Tsar was appointed by God.