/ Dictionary / Index C central processing unit: Meaning and Definition of Find definitions for: cen'tral proc'essing u"nit Pronunciation: [key] — Computers. Computers. SeeAlso called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Central Powers central projection Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language