noun
A political stance of staying out of alliances and conflicts between other nations; often used in historical or diplomatic contexts.
冷戦時代、多くの国が局外中立主義を掲げた。
During the Cold War, many countries adopted a policy of neutralism.
中立主義 is a broader term for neutralism or neutrality in general, while 局外中立主義 specifically emphasizes staying outside (局外) of conflicts or alliances.
Compound of 局外 (outside the situation) + 中立 (neutrality) + 主義 (doctrine). The term likely emerged in modern political discourse to describe a policy of non-alignment.