omega Meaning, Definition & Usage

  1. noun the ending of a series or sequence
    Z.
    • the Alpha and the Omega, the first and the last, the beginning and the end"--Revelation
  2. noun the last (24th) letter of the Greek alphabet

WordNet

O*me"ga noun
Etymology
NL., fr. Gr. , i.e., the great or long o. Cf. Mickle.
Definitions
  1. The last letter of the Greek alphabet. See Alpha.
  2. The last; the end; hence, death.
    "Omega! thou art Lord," they said. Tennyson.
    Rev. i. 8.
    The alpha and omega of science. Sir J. Herschel.

Webster 1913