Cancel, cancellation, or cancelled may refer to:

Business

Project cancellation A project is a type of assignment, typically involving research or design, that is carefully plan, planned to achieve a specific objective. An alternative view sees a project managerialism, managerially as a sequence of events: a "set of inter ...

, in government and industry *

Cancellation (mail) A cancellation (or cancel for short; French: ) is a postal marking applied on a postage stamp or postal stationery to deface the stamp and to prevent its reuse. Cancellations come in a huge variety of designs, shapes, sizes, and colors. Modern c ...

, a postal marking applied to a stamp or stationery indicating the item has been used *

Cancellation (insurance) Cancellation of an insurance policy before the end of the policy period has the effect of ending the insurance coverage on the date of the cancellation. This can result in a partial return premium which can be calculated in different ways dependin ...

, the termination of an insurance policy *

Flight cancellation and delay A flight delay occurs when an airline flight takes off and/or lands later than its scheduled time. The United States Federal Aviation Administration (FAA) considers a flight to be delayed when it is 15 minutes later than its scheduled time. A f ...

, not operating a scheduled flight

Sociology

Cancel culture Cancel culture is a cultural phenomenon in which an individual thought to have acted or spoken in an unacceptable manner is ostracized, boycotted, shunned or fired, often aided by social media. This shunning may extend to social or professio ...

, boycotting and ostracism calling out offensive behavior on social media or in real life

Technology and science

Cancel leaf A cancel is a bibliographic term for a replaced leaf in a printed book.Bibliographical Notes and Queries - Volumes 1-2 - Page 11 1935 - Normally, a cancel leaf is of course later than what I may call an integral leaf. The technique for this is ...

, a bibliographic term for replaced leaves in printed books *

Cancellation property In mathematics, the notion of cancellativity (or ''cancellability'') is a generalization of the notion of invertibility. An element ''a'' in a magma has the left cancellation property (or is left-cancellative) if for all ''b'' and ''c'' in ''M ...

, the mathematical property if ''a''×''b'' = ''a''×''c'' then ''b'' = ''c'' ** Cancelling out, a technique for simplifying mathematical expressions *

Catastrophic cancellation In numerical analysis, catastrophic cancellation is the phenomenon that subtracting good approximations to two nearby numbers may yield a very bad approximation to the difference of the original numbers. For example, if there are two studs, one L ...

, numerical error arising from subtracting approximations to nearby numbers * Noise cancellation, a method for reducing unwanted sound *

Phase cancellation In physics, interference is a phenomenon in which two coherence (physics), coherent waves are combined by adding their intensities or displacements with due consideration for their phase (waves), phase difference. The resultant wave may have ...

, the effect of two waves that are out of phase with each other being summed *

Cancel message Control messages are a special kind of Usenet post that are used to control news servers. They differ from ordinary posts by a header field named Control. The body of the field contains control name and arguments. There are two historical alterna ...

, a special message used to remove Usenet articles posted to news servers *

Cancel character In telecommunications and character encoding, the term cancel character refers to a control character which may be either of: #"CAN", "Cancel", U+0018, or ^X used to indicate that the data with which it is associated are in error An error ...

, an indication that transmitted data are in error or are to be disregarded * Resolution rule, in propositional logic a valid inference rule that produces a new clause by two clauses containing complementary literals. *

Cancellable (linguistics) In the linguistic field of pragmatics, an inference is said to be defeasible or cancellable if it can be made to disappear by the addition of another statement, or an appropriate context. For example, sentence would normally implicate iby ...

, a property of implicatures and presuppositions

Entertainment

Cancellation (television) In broadcasting, cancellation refers to when a radio or television program is abruptly ended by orders of the network or syndicator that distributes the show, usually against the intentions of the show's creators or producers. Programs are typ ...

, the termination of a television series * "Cancelled" (''South Park''), a 2003 episode of the TV series ''South Park'' * "Canceled" (''Nikita''), a 2013 episode of ''Nikita'' * "Canceled" (song), a 2020 song by Larray * ''Cancelled'' (EP), a 2024 EP by Mötley Crüe *

Canceled (film) ''Canceled'' is a Swedish horror film, released to cinemas on 25 August 2023. It is distributed by Nordisk Film. Plot Alex hosts and produces the show ”Gone Ghosting”, after faking several ghost encounters and treating members of his produc ...

, a Swedish horror film

People and characters

Robinson Cancel Robinson Cancel Castro (born May 4, 1976) is a Puerto Rican former professional baseball catcher. He played in Major League Baseball (MLB) from 1999 to 2011 for the Milwaukee Brewers, New York Mets, and Houston Astros. Early life Cancel was ...

(born 1976), baseball catcher *

Rafael Cancel Miranda Rafael Cancel Miranda (July 18, 1930 – March 2, 2020) was a poet, political activist, member of the Puerto Rican Nationalist Party and an advocate of Puerto Rican independence. On March 1, 1954, Cancel Miranda and three other Nationalists (Lo ...

(born 1930), political activist *An alternate name for the archangel

Camael Camael, also spelled Chamuel, Khamuel, Camiel, Cameel and Camniel, is an archangel in Christian angelology. Camael was excluded from the Holy See's list of named angels in the 2001 ''Directory on popular piety'', which states: "The practice ...

Government

Cancellation of removal Cancellation of removal is a provision of the Immigration and Nationality Act (INA) of the United States that allows some aliens who are in removal proceedings, who have lived in the United States for a long period of time and meet certain other ...

, a form of immigration relief available to aliens in the United States who be otherwise inadmissible or deportable *Cancellation of