1
- the last letter of the Greek alphabet (Ω, ω), transliterated as 'o' or 'ō'希腊字母表中最后一个字母（译写为o 或 ō） 。
1.1
- the last of a series; the final development（一系列中）最后一个; 结局：
as modifier the omega point.最后一点。
1.2
Omega
followed by Latin genitive Astronomy the twenty-fourth star in a constellation【天文】ω星（星座中第二十四颗星）：Omega Scorpii.
天蝎座ω星。
词源
from Greek ō mega 'the great O'.