Omega (capital: ?, lowercase: ?; Greek ?, later ? ????, Modern Greek ?????) is the 24th and last letter of the Greek alphabet. In the Greek numeric system, it has a value of 800. The word literally means "great O" (? mega, mega meaning "great"), as opposed to omicron, which means "little O" (o mikron, micron meaning "little").
In phonetic terms, the Ancient Greek ? is a long open-mid o [??], comparable to the vowel of British English raw. In Modern Greek, ? represents the mid back rounded vowel /o/, the same sound as omicron. The letter omega is transcribed ? or simply o.
As the last letter of the Greek alphabet, Omega is often used to denote the last, the end, or the ultimate limit of a set, in contrast to alpha, the first letter of the Greek alphabet. Wikipedia, Omega
H.P. Blavatsky
"The radiant light of the universal magnetic ocean, whole electric waves bind the cosmos together, and in their ceaseless motion penetrate every atom and molecule of the boundless creation, the disciples of mesmerism — howbeit insufficient their various experiments — intuitionally perceive the alpha and omega of the great mystery. Alone, the study of this agent, which is the divine breath, can unlock the secrets of psychology and physiology, of cosmical and spiritual phenomena." [H.P. Blavatsky, Isis Unveiled, Volume 1, Page 28]
See Also