noun
Political term referring to a policy of acting alone without consulting or coordinating with other nations. Often contrasted with multilateralism.
See also: 単独行動主義
その国の単独主義は国際社会から批判された。
That country's unilateralism was criticized by the international community.
単独主義的な外交政策は同盟国との摩擦を生む。
A unilateralist foreign policy creates friction with allies.
Compound of 単独 (tandoku, 'alone, independent') + 主義 (shugi, 'principle, doctrine'). A straightforward Sino-Japanese political term.