/ Dictionary / Index D de Moivre's theorem: Meaning and Definition of Find definitions for: de Moi'vre's the'orem Pronunciation: [key] — Math. Math. the theorem that a complex number raised to a given positive integral power is equal to the modulus of the number raised to the power and multiplied by the amplitude times the given power. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. de Moivre demolish Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language