Becoming inflexible or out of date

• The process of fossilizing a plant or animal that existed in some earlier age
• The process of being turned to stone

WordNet Word definitions in WordNet
n. the process of fossilizing a plant or animal that existed in some earlier age; the process of being turned to stone [syn: fossilization ] becoming inflexible or out of date [syn: fossilization ]

Wiktionary Word definitions in Wiktionary
n. (standard spelling of fossilization from=British spelling)