The term "approach" refers to the method or strategy that someone uses to handle a particular situation or problem. In the context of President Lincoln's approach to Southern secession, it refers to his overall stance and actions towards addressing the issue.
Related terms
Diplomacy: Diplomacy involves using negotiation and tactful communication to resolve conflicts peacefully.
Compromise: Compromise is when two opposing sides reach an agreement by making concessions.
Union Preservation: Union preservation refers to efforts made by President Lincoln to maintain the unity of the United States during the secession crisis.