omission(Noun) Something not done or neglected. omission(Noun) The shortening of a word or phrase, using an apostrophe ( ' ) to replace the missing letters, often used to approximate the sound of speech or a specific dialect.
omission, deletion(noun) any process whereby sounds or words are left out of spoken words or phrases. Synonyms: deletion, skip, excision, cut. omission(noun) neglecting to do something; leaving out or passing over something.