omission
//əˈmɪʃ.ən//
Noun
omissionSingular
omissionsPlural
1
The act of leaving out or excluding something or someone.
The omission of her name from the list was a mistake.
2
Something that has been left out or not done.
There are several omissions in the report that need to be addressed.
3
A failure to do something, especially something that one has a moral or legal obligation to do.
The accident was caused by an omission of safety checks.