1. the remains or traces of a plant or animal that lived long ago, preserved in rock or other material
2. a person with old-fashioned ideas who is resistant to change
Usage: informal

1. relating to or being a fossil
2. formed from the remains of ancient plants or animals

Examples

• The museum displayed dinosaur fossils from millions of years ago.
• Scientists study fossils to learn about prehistoric life.
• My grandfather is such a fossil when it comes to technology.
• The fossil record shows how species evolved over time.
• They discovered fossil fuels deep underground.
• The limestone contained many small fossil shells.
• Fossil evidence supports the theory of evolution.