Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

omega

play
noun ome·ga \ō-ˈmā-gə, -ˈmē-, -ˈme-\

Simple Definition of omega

  • : the 24th and last letter of the Greek alphabet

Source: Merriam-Webster's Learner's Dictionary

Full Definition of omega

  1. 1 :  the 24th and last letter of the Greek alphabet — see alphabet table

  2. 2 :  the extreme or final part :  end

  3. 3 a :  a negatively charged elementary particle that has a mass 3270 times the mass of an electron —called also omega minus b :  a very short-lived unstable meson with mass 1532 times the mass of an electron —called also omega meson

Origin of omega

Middle English, from Greek ō mega, literally, large o


First Known Use: 15th century

Rhymes with omega


Medical Dictionary

omega

adjective ome·ga

Medical Definition of omega

  1. :  of, relating to, or being a chemical group or position at the end of a molecular chain <omega oxidation of fatty acids>



Variants of omega

or ω- \ō-ˈmeg-ə, -ˈmā-gə, especially British ˈō-meg-ə\play play play


Learn More about omega

  1. Medical Dictionary: Definition of "omega"


Seen and Heard

What made you want to look up omega? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to dishevel or rumple

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

alt-5746713d76276

Which of these is a synonym of nonplus?

soothe perplex reduce disapprove
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ