1. to organize or unite (states, regions, or groups) into a federal system of government
Usage: British spelling (American: federalizes); third person singular present tense

Examples

• The new constitution federalises the previously independent provinces.
• The government federalises power among the regional authorities.
• This policy federalises healthcare across all member states.
• The treaty federalises the economic systems of participating nations.
• The reform federalises decision-making at the national level.