1. to become preserved as a fossil through natural processes over long periods of time
2. to cause something to become preserved as a fossil
3. to become rigid, outdated, or unable to change
Usage: figurative

Examples

• The dinosaur bones fossilized over millions of years.
• Sediment layers helped fossilize the ancient plant remains.
• Scientists study how different materials fossilize under various conditions.
• The company’s outdated policies have fossilized over decades.
• Without reform, the institution will continue to fossilize.
• The amber fossilized the insect perfectly.
• Traditional practices can fossilize if not adapted to modern times.