/ə'mɪʃn; ə`mɪʃən/
n
1 [U] action of omitting or leaving out sb/sth 忽略; 疏忽; 省略; 删除; 遗漏; 排除
*The play was shortened by the omission of two scenes. 该剧经删去两场而缩短了.
* His omission from the team is rather surprising. 队里没有他, 令人惊奇.
* (fml 文) sins of omission, ie not doing things that should be done 疏忽罪.
2 [C] thing that is omitted 省略、删除、遗漏或排除之事物
*This list of names has a few omissions. 这名单有若干缺漏.

n
[U]
when you do not include or do not do something
omission of
　The omission of her name was not a deliberate act.
omission from
　his omission from the team
[C]
something that has been omitted
　Copies of the lists were posted so that omissions could be corrected.
serious/notable/major omission
　Your failing to note her mistakes is a serious omission.
a glaring omission
(=one that is very bad and easily noticed)