/ Dictionary / Index R real part: Meaning and Definition of Find definitions for: re'al part' Pronunciation: (rē'ul, rēl), [key] — Math. Math. the number a in the complex number a + bi. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. real number realpolitik Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language