Definition of "epsilon"

The name for the fifth letter of the Greek alphabet, ε or Ε, preceded by delta (Δ, δ) and followed by zeta (Ζ, ζ).  examples

(phonetics) In IPA, the phonetic symbol ɛ that represents the open-mid front unrounded vowel.  examples

(mathematics) An arbitrarily small quantity.

1. (colloquial) A small child.  examples

(computing, colloquial) Something negligible or insignificant.  quotations  examples

(finance) The percentage change in an option value with respect to the underlying dividend yield.  examples