n.[U][C]

1. 省略；删除
   The omission of "for" in this sentence is incorrect.

   这一句中省略“for”是不正确的。

2. 遗漏；疏忽；失职
   This task does not allow any omissions.

   这项工作不容许有任何疏忽。

   The omission of this chapter from the third edition was a gross oversight.

   第三版漏印这一章是个大疏忽。