1. organizations of workers formed to protect their rights and interests
2. the acts of joining or combining two or more things together
3. marriages or wedding ceremonies
Usage: formal

Examples

• The factory workers formed unions to negotiate better wages.
• Several unions went on strike to protest unsafe working conditions.
• The unions of these two companies created a powerful corporation.
• The chemical unions produced unexpected results in the laboratory.
• Their families celebrated the unions of their children.
• The unions were blessed by the local minister.
• Labor unions have historically fought for workers’ rights.