1. (v. t.) To convert into a fossil; to petrify; as, to fossilize bones or wood.

2. (v. t.) To cause to become antiquated, rigid, or fixed, as by fossilization; to mummify; to deaden.

3. (v. i.) To become fossil.

4. (v. i.) To become antiquated, rigid, or fixed, beyond the influence of change or progress.

age anneal antiquate become extinct become obsolete calcify callous case harden cornify date fade firm fust grow old harden indurate lapidify lithify lose currency molder obsolesce ossify outdate perish petrify rust steel superannuate temper toughen vitrify