/ pɔːˈnɒgrəfi; NAmE pɔːrˈnɑːg-/ (also informal porn ) noun
[ U ] ( disapproving ) books, videos, etc. that describe or show naked people and sexual acts in order to make people feel sexually excited, especially in a way that many other people find offensive :
child pornography
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WORD ORIGIN
mid 19th cent.: from Greek pornographos writing about prostitutes, from pornē prostitute + graphein write.