Definition of "omission" []

• The act or an instance of omitting. (noun)
• The state of having been omitted. (noun)
• Something omitted or neglected. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "In an accompanying editorial, Katie Weinger of Harvard Medical School's department of psychiatry says one danger of insulin omission is that doctors who treat patients with low adherence may mistake poor blood glucose readings for the need for more insulin."
• "Fans may see this as a missed opportunity to see the classic Dinobot lineup of Grimlock, Slag, Sludge, Snarl and Swoop, but Furman thinks their omission is a pragmatic decision."
• "If you've never been listed in Wikipedia, you can always argue that your omission is an oversight."