Revocation refers to the act of cancelling or withdrawing something that has been previously granted, approved or issued. It is the process of taking back a license, permission, charter, or other legal document, usually due to breach of conditions or rules set by the grantor. Revocation may also refer to the retraction or removal of something published or broadcasted, such as a publication or news article, due to errors, inaccuracies or violation of standards. In essence, revocation is an act of withdrawing or nullifying something that was previously given or recognized.