1. things that have been left out or not included
Usage: plural of omission
2. failures to do something that should have been done
Usage: plural of omission

Examples

• The report contained several important omissions.
• She noticed omissions in the guest list for the wedding.
• The editor corrected the omissions in the manuscript.
• There were glaring omissions in his testimony.
• The teacher marked points off for omissions in the essay.
• The contract had dangerous omissions that needed to be addressed.
• His omissions from the meeting notes caused confusion later.