/ Dictionary / Index E Euler's formula: Meaning and Definition of Find definitions for: Eu'ler's for'mula Pronunciation: [key] the theorem that e = cosx + isinx. a formula for determining the maximum load that can be applied to a given column without causing it to buckle. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Euler's diagram Euler's phi-function Related Content Daily Word Quiz: effervescent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language