noun
decision; judgment; resolution
A concise, formal noun for a decision or judgment, especially one made after deliberation. In everyday speech, 決断 or 判断 is often more natural; 断 commonly appears in set phrases like 断を下す and 断を仰ぐ.
彼は迷った末に断を下した。
After much hesitation, he made a decision.
社長の断を仰いでから返事をします。
I will reply after seeking the president's decision.