1. most important; having influence or control over all other parts
2. forming an arch over something
Usage: literal sense

Examples

• The overarching goal of the project is to reduce pollution.
• Education reform was the overarching theme of her campaign.
• The company’s overarching strategy focuses on customer satisfaction.
• We need an overarching plan that addresses all departments.
• The overarching branches created a natural canopy above the path.
• His overarching concern was the safety of his employees.
• The overarching bridge connected the two sides of the valley.