/ Dictionary / Index P precess: Meaning and Definition of Find definitions for: pre•cess Pronunciation: (prē-ses'), [key] — v.i. Mech. to undergo precession (def. 2). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: precess (Thesaurus) preceptress precession Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language