something that was left out or not included

omission

noun|/oʊˈmɪʃ.ən/

Something that has been left out or excluded

Examples

In a meeting

The omission of pricing details made the proposal incomplete.

Over coffee

Forgetting to invite Sarah was a major omission on my part.

Why this word

exclusion

omission implies something left out (possibly by accident), while exclusion suggests deliberate rejection

gap

omission specifically refers to something that should have been included but wasn't, while gap is just any empty space

oversight

omission is the neutral fact of leaving something out, while oversight implies it was an unintentional mistake

Usage tip

Use to point out what's missing without being accusatory; often more diplomatic than saying someone 'forgot'

Etymology

Latin 'omissio' from 'omittere' (to let go, disregard)

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