omission

Universal Words noun 1 [U] ~ (from sth) the act of not including sb/sth or not doing sth; the fact of not being included/done: Everyone was surprised at her omission from the squad. * The play was shortened by the omission of two scenes. * (formal) sins of omission (= not doing things that should be done) 2 [C] a thing that has not been included or done: There were a number of errors and omissions in the article.