Smith's Bible Dictionary
Ome'ga or O'mega. The last letter of the Greek alphabet. It is used metephorically to denote the end of anything, Revelation 1:8; Revelation 1:11.
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Smith, William, Dr. Entry for 'Omega'. Smith's Bible Dictionary. https://www.studylight.org/dictionaries/eng/sbd/o/omega.html. 1901.