/ Dictionary / Index E epsilon-delta: Meaning and Definition of Find definitions for: ep•si•lon-del•ta Pronunciation: (ep'su-lon"del'tu, -lun- or, esp. Brit., ep-sī'lun-), [key] — adj. Math. of or pertaining to a method or proof in calculus involving arbitrarily small numbers. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. epsilon epsilon-neighborhood 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