Omission

Omission may refer to:
 * Sin of omission, a sin committed by willingly not performing a certain action
 * Omission (law), a failure to act, with legal consequences
 * Omission bias, a tendency to favor inaction over action
 * Purposeful omission, a literary method
 * Theory of omission, a writing technique
 * The Omission, a 2018 Argentine film
 * Selective omission, an effort to forget traumatic memories
 * Lying by omission