1. present participle of fortress; to strengthen or protect (a place) by building fortifications or defensive structures
2. to make secure or resistant to attack or intrusion
Usage: often used figuratively

1. the act or process of building or strengthening fortifications

Examples

• The military began fortressing the border with new defensive walls.
• They are fortressing their network against cyber attacks.
• The fortressing of the castle took several years to complete.
• By fortressing the position, the commander ensured the troops could withstand a siege.
• The company is fortressing its market share through strategic partnerships.
• Medieval engineers specialized in fortressing towns and cities.
• Fortressing the perimeter was the first priority after the security breach.