/ Dictionary / Index L lithify: Meaning and Definition of Find definitions for: lith•i•fy Pronunciation: (lith'u-fī"), [key] — v., -fied, -fy•ing. —v.t. to change (sediment) to stone or rock. —v.i. to become lithified. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lithification lithium Related Content Daily Word Quiz: winsome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language