Omega
Pronunciation : O*me"ga
Part of Speech : n.
Etymology : [NL., fr. Gr. Mickle.]
Definition : 1. The last letter of the Greek alphabet. See Alpha.
2. The last; the end; hence, death. "Omega! thou art Lord," they said. Tennyson. Alpha and Omega, the beginning and the ending; hence, the chief, the whole. Rev. i. 8. The alpha and omega of science. Sir J. Herschel.
Source : Webster's Unabridged Dictionary, 1913