1. 信条;主义;学说;（尤指）宗教教义
A doctrine is a set of principles or beliefs, especially religious ones.

2. (尤指政府外交政策的)正式声明
A doctrine is a statement of official government policy, especially foreign policy.

1. a belief (or system of beliefs) accepted as authoritative by some group or school

Synonym: philosophyphilosophical systemschool of thoughtism