porn UK /pɔːn/US /pɔɹn/ noun4 •(informal) movies, pictures or writing that show sex openly, made to give people sexual pleasureI just delete the porn before someone else uses the computer. •[in the plural] (informal) A pornographic work.There are anywhere from ten to twelve chapters in the average porn, so that many blank pages can be inserted. — 1982 •(informal) Material, usually visual, presenting something desirable in a sensational manner. •(informal, humorous) Material that provides illicit gratification of an obsessive or unhealthy interest in something. formsporns