from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The 24th letter of the Greek alphabet. See Table at alphabet.
- n. The end.
- n. See omega baryon.
- n. See omega meson.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The twenty-fourth letter of the Classical and the Modern Greek alphabet, and the twenty-eighth letter of the Old and the Ancient Greek alphabet, i.e. the last letter of every Greek alphabet. Uppercase version: Ω; lowercase: ω.
- n. The end; the final, last or ultimate in a series.
from the GNU version of the Collaborative International Dictionary of English
- n. The last letter of the Greek alphabet. See alpha.
- n. The last; the end; hence, death.
from The Century Dictionary and Cyclopedia
- n. The last letter of the Greek alphabet (
Ω, ω); hence, figuratively, the last of anything.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the last (24th) letter of the Greek alphabet
- n. the ending of a series or sequence
Middle English, from Greek ō mega, large o (from its being a long vowel in Greek) : ō, the letter o + mega, neuter of megas, large, great; see meg- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Middle English, from Ancient Greek ὦ μέγα (mega, "large") (omega is a long vowel in Ancient Greek). (Wiktionary)