- 1extremely frightened synonym terrified a petrified expression petrified (of something) I'm petrified of snakes. They were petrified with fear (= so frightened that they were unable to move or think). petrified (that…) She was petrified that the police would burst in at any moment.
- 2[only before noun] petrified trees, insects, etc. have died and been changed into stone over a very long period of time a petrified forest