The difference between Cancel and Undo
When used as nouns, cancel means a control message posted to usenet that serves to cancel a previously posted message, whereas undo means an operation that reverses a previous action.
When used as verbs, cancel means to cross out something with lines etc, whereas undo means to reverse the effects of an action.
check bellow for the other definitions of Cancel and Undo
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Cancel as a verb (transitive):
To cross out something with lines etc.
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Cancel as a verb (transitive):
To invalidate or annul something.
Examples:
"He cancelled his order on their website."
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Cancel as a verb (transitive):
To mark something (such as a used postage stamp) so that it can't be reused.
Examples:
"This machine cancels the letters that have a valid zip code."
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Cancel as a verb (transitive):
To offset or equalize something.
Examples:
"The corrective feedback mechanism cancels out the noise."
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Cancel as a verb (transitive, mathematics):
To remove a common factor from both the numerator and denominator of a fraction, or from both sides of an equation.
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Cancel as a verb (transitive, media):
To stop production of a programme.
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Cancel as a verb (printing, dated):
To suppress or omit; to strike out, as matter in type.
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Cancel as a verb (obsolete):
To shut out, as with a railing or with latticework; to exclude.
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Cancel as a verb (slang):
To kill.
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Cancel as a noun (Internet):
A cancellation (US); (nonstandard in some kinds of English). A control message posted to Usenet that serves to cancel a previously posted message.
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Cancel as a noun (obsolete):
An enclosure; a boundary; a limit.
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Cancel as a noun (printing):
The suppression on striking out of matter in type, or of a printed page or pages.
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Cancel as a noun (printing):
The page thus suppressed.
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Cancel as a noun (printing):
The page that replaces it.
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Undo as a verb:
To reverse the effects of an action.
Examples:
"Fortunately, we can undo most of the damage to the system by the war."
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Undo as a verb:
To unfasten.
Examples:
"Could you undo my buckle for me?"
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Undo as a verb (figuratively):
To impoverish or ruin, as in reputation; to cause the downfall of.
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Undo as a noun (computing):
An operation that reverses a previous action.
Examples:
"How many undos does this program support?"
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Undo as an adjective: