If you make an omission, you leave something out. If you are a restaurant reviewer and you give a glowing review to a new restaurant but fail to mention that you own half of it, that's a significant omission.

The noun omission comes from the verb, omit, which means to leave out. Omissions can be purposeful or a result of neglect. Was the omission of Aunt Suzy from your wedding invitation something you meant to do, or an accident? If you're cleaning the house but don't take out the garbage, you'll regret your omission when the garbage is stinking up the kitchen.

Definitions of omission

n neglecting to do something; leaving out or passing over something

inadvertence, oversight
an unintentional omission resulting from failure to notice something
letting pass without notice
elision, exception, exclusion
a deliberate act of omission
Type of:
disregard, neglect
lack of attention and due care

n something that has been omitted

“she searched the table for omissions
Type of:
disuse, neglect
the state of something that has been unused and neglected

n a mistake resulting from neglect

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an unexpected omission
dashing hopes, disappointment
an act (or failure to act) that disappoints someone
a failure to perform some promised act or obligation
a failure to face some difficulty squarely
Type of:
error, fault, mistake
a wrong action attributable to bad judgment or ignorance or inattention

n any process whereby sounds or words are left out of spoken words or phrases

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aphaeresis, apheresis
(linguistics) omission at the beginning of a word as in `coon' for `raccoon' or `till' for `until'
the gradual disappearance of an initial (usually unstressed) vowel or syllable as in `squire' for `esquire'
omission of a sound between two words (usually a vowel and the end of one word or the beginning of the next)
eclipsis, ellipsis
omission or suppression of parts of words or sentences
Type of:
linguistic process
a process involved in human language

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