| Fossilize 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. Thesaurus Entries 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 |