1. a person or entity that federates or unites separate groups, states, or organizations into a federal system
Usage: often used in historical or political contexts

Examples

• The federator worked to bring the thirteen colonies together under one government.
• As a federator of the regional sports leagues, she coordinated rules and schedules across all teams.
• The founding federators believed in a strong central authority balanced with state powers.
• He served as federator, helping to merge the independent companies into a unified corporation.
• The federator's vision was to create harmony among the previously competing factions.