To cross out something with lines etc.
To invalidate or annul something.
He cancelled his order on their website.
To mark something (such as a used postage stamp) so that it can't be reused.
This machine cancels the letters that have a valid zip code.
To offset or equalize something.
The corrective feedback mechanism cancels out the noise.
To remove a common factor from both the numerator and denominator of a fraction, or from both sides of an equation.
To stop production of a programme.
To suppress or omit; to strike out, as matter in type.
To shut out, as with a railing or with latticework; to exclude.
To kill.
To cease to provide financial or moral support to (someone deemed unacceptable). Compare cancel culture.
No longer planned or scheduled.
The cancelled show would have drawn 5,000 fans.
(of a mail item) Marked over the stamp, to show that the stamp has been used.