Wiktionary
n. The destruction, removal, or recalling of books, motion pictures, electronic games, the taking of television programs off the air, or the shutting down of Web sites as a form of censorship, especially motivated by religious or political objections to the material.
Wikipedia
Book burning refers to the ritual destruction by fire of books or other written materials. Usually carried out in a public context, the burning of books represents an element of censorship and usually proceeds from a cultural, religious, or political opposition to the materials in question.
In some cases, the destroyed works are irreplaceable and their burning constitutes a severe loss to cultural heritage. Examples include the obliteration of the Library of Baghdad, the burning of books and burying of scholars under China's Qin Dynasty, the destruction of Aztec codices by Itzcoatl.
In other cases, such as the Nazi book burnings, other copies of the destroyed books survive - but still, the instance of book burning becomes emblematic of a harsh and oppressive regime which is seeking to censor or silence an aspect of a nation's culture.
Book burning can be an act of contempt for the book's contents or author, and the act is intended to draw wider public attention to this opinion. Examples include the burning of Wilhelm Reich's books by the FDA and the 2010 Qur'an-burning controversy.
Art destruction is related to book burning, both because it might have similar cultural, religious, or political connotations, and because in various historical cases books and artworks were destroyed at the same time.
In modern times, other forms of media, such as phonograph records, video tapes, and CDs have also been burned, shredded, or even crushed by a road-roller.