Breadcrumb Home > Dictionary > Index I Cite imaginary number: Meaning and Definition of Find definitions for: imag'inary num'ber Pronunciation: [key] ? Math. Math. Also calleda complex number having its real part equal to zero. Random House Unabridged Dictionary, Copyright 1997, by Random House, Inc., on Infoplease. imaginary axis imaginary part TrendingHere are the facts and trivia that people are buzzing about. February 2021 Current Events: US News The Berlin Conference and the Partition of Africa The Implied Powers of Congress Noble Titles and Ranks in a Monarchy Keeping Your Brain Active in a COVID-19 World The Manchu Related Content Daily Word Quiz: puerile Analogy of the Day: Today?s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language