omission
exclusion / failure to act / gap / neglect
Noun
pl: omissions
This term describes a gap or a void created by the absence of something that should be present. It carries a neutral tone when referring to simple mistakes in a text, but shifts toward a negative or critical connotation when the absence implies negligence or a deliberate attempt to hide information. In legal and ethical contexts, the word specifically denotes a failure to act. This distinguishes it from a commission, which is the act of doing something wrong; an omission is the wrong committed by doing nothing.
Meanings
Noun
The act of leaving something out, whether intentionally or accidentally.
"The omission of his name from the list was a serious mistake."