Definition of omega in US English:

omega

noun

  • 1The twenty-fourth, and last, letter of the Greek alphabet (Ω, ω), transliterated as ‘o’ or ‘ō.’.

    • ‘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.’
    • ‘What letter is before omega in the Greek alphabet?’
    • ‘Centered on the crest is the white carnation, with the Chi to the left and the Omega to the right of the flower.’
    • ‘Ah, yes, the round letters are quite small; yes, the omicrons and omegas seem to hover, there, in the middle of the line.’
    1. 1.1 The last of a series; the final development.
      as modifier ‘the omega point’
      • ‘That's the beginning and the end, the alpha and the omega, and there's no exceptions.’
      • ‘We are the alpha and the omega in seashore dining and freshly prepared gourmet seafood.’
      • ‘He is the alpha to my omega, the end to my beginning.’
      • ‘An alpha leads a pack, and the omega is the lowest standing.’
      • ‘Your work has a beginning and an end, an Alpha and an Omega.’
      • ‘There are dangers to thinking of time as headed inevitably to some omega point, of us being on some inevitable road to Armageddon.’
      • ‘He is the alpha and the omega, the principle and the end, the foundation stone and the keystone, the plenitude and the plenifier.’
      • ‘For a Pack werewolf, such a handicap would condemn me to omega status - the bottom of the heap.’
      • ‘I think those guys who talk about animals on the telly, like that old Brit guy, would term me ‘the omega of the pack’.’
      • ‘Are we willing to be the alpha and the omega rather than stand in the middle all the time?’
      • ‘The alpha and the omega for this man who's worked to become the most despised, the most frightening artist in music.’
      • ‘And grip variations seem to span the alpha to the omega of possibilities.’
    2. 1.2OmegaAstronomy followed by Latin genitive The twenty-fourth star in a constellation.
      ‘Omega Scorpii’
      • ‘Hubble’s Advanced Camera for Surveys showed how the stars are bunching up near the center of Omega Centauri, as seen in the gradual increase in starlight near the center.’
      • ‘Omega Scorpii, a star, looks like a fifth moon, so don't be deceived.’
      • ‘Surveys showed how the stars are bunching up near the center of Omega Centauri, as seen in the gradual increase in starlight near the center.’
      • ‘Omega Centauri has been known to be an unusual globular cluster for a long time.’
      • ‘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.’

  • Ohm(s)

    ‘a 100Ω resistor’

Origin

From Greek ō mega ‘the great O’.

Pronunciation

omega

/ōˈmāɡə//oʊˈmeɪɡə/