1. the quality or state of being mighty; great power, strength, or force
2. greatness in size, extent, or degree; impressiveness

Examples

• The mightiness of the ocean waves was both beautiful and terrifying.
• Ancient civilizations built monuments to display their mightiness.
• The mightiness of the storm knocked down power lines across the city.
• She was impressed by the mightiness of the mountain range.
• The king’s mightiness was demonstrated through his vast army.
• The mightiness of the hurricane forced thousands to evacuate.