Definition of omega in English:


Line breaks: omega
Pronunciation: /ˈəʊmɪgə


  • 1The last letter of the Greek alphabet (Ω, ω), transliterated as ‘o’ or ‘ō’.
    More example sentences
    • Ah, yes, the round letters are quite small; yes, the omicrons and omegas seem to hover, there, in the middle of the line.
    • Alpha, rho, tau, sigma, omega, Ash went over the letters he saw in his mind while Lari just stared, apparently in her own little world.
    • After all, her father was a maths teacher who knew his alpha from his omega.
  • 1.1 [usually as modifier] The last of a series: the omega point
    More example sentences
    • There are dangers to thinking of time as headed inevitably to some omega point, of us being on some inevitable road to Armageddon.
    • For a Pack werewolf, such a handicap would condemn me to omega status - the bottom of the heap.
    • That's the beginning and the end, the alpha and the omega, and there's no exceptions.
  • 1.2 (Omega) [followed by Latin genitive] Astronomy The twenty-fourth star in a constellation: Omega Scorpii
    More example sentences
    • Finally there is Omega Scorpii, made up of two stars which. can be seen separately with the naked eye; the magnitudes are. 4.0 and 4.3.
    • Omega Scorpii, a star, looks like a fifth moon, so don't be deceived.
    • Omega Centauri has been known to be an unusual globular cluster for a long time.


Back to top  
  • 1 (Ω) Ohm(s): a 100Ω resistor
  • 1.1 (ω) Angular frequency.


from Greek ō mega 'the great O'.

More definitions of omega

Definition of omega in:

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day tortie
Pronunciation: ˈtôrtē
a tortoiseshell cat