1. to bring together or combine into a single unit or whole
2. to make uniform or consistent

Examples

• The new law will unify the different state regulations.
• The coach worked to unify the team after the conflict.
• They hope to unify the two companies under one brand.
• The treaty unified several small kingdoms into one nation.
• We need to unify our approach to customer service.
• The software will unify all our databases into one system.