Definitions:
decide or announce that (a planned event) will not take place

(of a factor or circumstance) neutralize or negate the force or effect of (another)

publicly boycott or withdraw support from (a person, organization, etc.) for promoting beliefs that are regarded as socially unacceptable

mark, pierce, or tear (a ticket or stamp) to show that it has been used or invalidated

a mark made on a postage stamp to show that it has been used

a new page or section inserted in a book to replace the original text, typically to correct an error