Look up cancel, cancellation, or cancelled in Wiktionary, the free dictionary.

Cancel, cancellation, or cancelled may refer to:

• Project cancellation, in government and industry
• Cancellation (mail), a postal marking applied to a stamp or stationery indicating the item has been used
• Cancellation (insurance), the termination of an insurance policy
• Flight cancellation and delay, not operating a scheduled flight

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

• Cancel leaf, a bibliographic term for replaced leaves in printed books
• Cancellation property, the mathematical property if a×b = a×c then b = c
  • Cancelling out, a technique for simplifying mathematical expressions
• Catastrophic cancellation, numerical error arising from subtracting approximations to nearby numbers
• Noise cancellation, a method for reducing unwanted sound
• Phase cancellation, the effect of two waves that are out of phase with each other being summed
• Cancel message, a special message used to remove Usenet articles posted to news servers
• Cancel character, 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), a property of implicatures and presuppositions

• Cancellation (television), the termination of a television series
• "Cancelled" (South Park), a 2003 episode of the TV series South Park
• Cancelled (Shameless), an episode of the American TV series Shameless
• "Canceled" (Nikita), a 2013 episode of Nikita
• "Canceled" (song), a 2020 song by Larray
• Cancelled (EP), a 2024 EP by Mötley Crüe
• Canceled (film), a Swedish horror film
• "Cancelled!", a song by Taylor Swift from the 2025 album The Life of a Showgirl

• Robinson Cancel (born 1976), baseball catcher
• Rafael Cancel Miranda (born 1930), political activist
• An alternate name for the archangel Camael

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

• Mitigation
• Nullification (disambiguation)
• All pages with titles beginning with Cancel
• All pages with titles containing Cancel

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