1. the slow movement of the axis of a spinning body around another axis
Usage: physics; astronomy
2. a ceremonial procession, especially a religious one
Usage: formal

Examples

• The precession of Earth’s axis causes the position of the North Star to change over thousands of years.
• Astronomers study the precession of spinning planets and stars.
• The precession of a gyroscope demonstrates important principles of physics.
• The cathedral held a solemn precession before the main service.
• Scientists can measure the rate of precession in rotating objects.
• The precession of the equinoxes was discovered by ancient Greek astronomers.