1. having a tendency or inclination toward something, especially something undesirable
2. lying face down with the front of the body touching the ground

Examples

• He is prone to making careless mistakes when he’s tired.
• Children are prone to catching colds in winter.
• The area is prone to flooding during heavy rains.
• She lay prone on the beach towel, soaking up the sun.
• The soldier crawled in a prone position to avoid detection.
• People with fair skin are prone to sunburn.
• The injured hiker was found lying prone on the trail.