1. the action of forming or process of being formed
2. a structure or arrangement of something
3. an arrangement of troops, ships, or aircraft in a particular pattern
Usage: military

Examples

• The formation of ice crystals occurs at freezing temperatures.
• Scientists studied the formation of the solar system.
• The dancers moved into different formations during the performance.
• The jets flew in tight formation across the sky.
• The military practiced various battle formations.
• Geologists examined the ancient rock formations in the canyon.
• The limestone formations created beautiful cave structures.
• Cloud formations indicated an approaching storm.