cancel

(noun) a notation cancelling a previous sharp or flat. Synonyms: natural.

(verb) postpone indefinitely or annul something that was scheduled. Synonyms: call off, scratch, scrub. Examples: "Call off the engagement." "Cancel the dinner party." "We had to scrub our vacation plans." "Scratch that meeting--the chair is ill."

(verb) make up for. Synonyms: offset, set off. Examples: "His skills offset his opponent's superior strength."

(verb) declare null and void; make ineffective. Synonyms: strike down. Examples: "Cancel the election results." "Strike down a law."

(verb) remove or make invisible. Synonyms: delete. Examples: "Please delete my name from your list."

(verb) make invalid for use. Synonyms: invalidate. Examples: "Cancel cheques or tickets."