1. to join together in a federation or alliance

1. joined together in a federation

Examples

• The small nations decided to federate for mutual protection.
• Several trade unions voted to federate into a larger organization.
• The colonies chose to federate rather than remain separate territories.
• The federate states maintained some independence while sharing common policies.
• Universities often federate to share resources and research.
• The federate system allowed each region to keep its local customs.