Wordnet 3.0
ADJECTIVE (1)
1. 
 set in a rigidly conventional pattern of behavior, habits, or beliefs; 
- Example: "obsolete fossilized ways"- Example: "an ossified bureaucratic system"[syn: fossilized, fossilised, ossified]
WordNet (r) 3.0 (2006):
fossilised
    adj 1: set in a rigidly conventional pattern of behavior,
           habits, or beliefs; "obsolete fossilized ways"; "an
           ossified bureaucratic system" [syn: fossilized,
           fossilised, ossified]