/ Dictionary / Index P prestore: Meaning and Definition of Find definitions for: pre•store Pronunciation: (prē-stôr', -stōr'), [key] — -stored, -stor•ing. to fix an opening value for (the address of an operand or of a cycle index). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Prestonpans prestress Related Content Daily Word Quiz: supine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language