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omega

[oh-mee-guh, oh-mey-, oh-meg-uh]
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noun
  1. the 24th and last letter of the Greek alphabet (Ω, ω).
  2. the vowel sound represented by this letter.
  3. the last of any series; the end.
  4. omega baryon.
  5. omega meson.

Origin of omega

< Greek ō méga literally, great o. Cf. omicron
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for omega

finish, closure, resolution, retirement, result, outcome, issue, conclusion, completion, finale, period, denouement, ending, termination, close, finis, omega, consummation, desuetude, cease

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British Dictionary definitions for omega

omega

noun
  1. the 24th and last letter of the Greek alphabet (Ω, ω), a long vowel, transliterated as o or ō
  2. the ending or last of a series

Word Origin for omega

C16: from Greek ō mega big o; see mega-, omicron
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for omega

c.1400, from Medieval Greek omega, from classical Greek o mega "big 'o' " (in contrast to o micron "little 'o' "); so called because the vowel was long in ancient Greek. From mega (see mega-). The final letter of the Greek alphabet, hence used figuratively for "the last, final" of anything (cf. Rev. i:8),

Online Etymology Dictionary, © 2010 Douglas Harper
omega in Medicine

omega

[ō-mĕg′ə, ō-mē′gə, ō-mā′-]
n.
  1. The 24th letter of the Greek alphabet.
adj.
  1. Of or characterizing a chemical group or position at the end of a molecular chain, such as omega-oxidation.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
omega in Science

omega

[ō-mĕg′ə, ō-mē′gə, ō-mā′-]
  1. An omega baryon.
  2. An omega meson.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Idioms and Phrases with omega

omega

see alpha and omega.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.