What is a "secondary boycott" in the context of labor relations?

A secondary boycott refers to a situation in labor relations where a union encourages other individuals or organizations, such as other companies or consumers, not to patronize a business that is involved in a labor dispute with the union. This tactic aims to leverage additional pressure on the target business by enlisting support from the broader community or industry, thus amplifying the impact of the union's primary strike or other labor actions.

Secondary boycotts can be a strategic tool for unions as they attempt to gain leverage in negotiations, as they can disrupt the operations of the primary employer by affecting their sales or forcing them to alter their business practices. This method seeks to create a ripple effect of support that extends beyond the direct conflict, effectively isolating the business in question from potential allies and customers.

Understanding the dynamics of secondary boycotts is crucial for grasping how unions mobilize support in labor disputes and the legal and economic ramifications of these actions within labor relations. The other options do not accurately define or relate to the concept of secondary boycotts as they miss the essence of encroaching support from third-party entities or highlight aspects that are unrelated to the strategic goals of labor unions in negotiations.