text: what does html mean and why is it blocked a lot??   html (āch'tē-ĕm-ĕl')  n. a markup language used to structure text and multimedia documents and to set up hypertext links between documents, used extensively on the world wide web.  [h(yper)t(ext) m(arkup) l(anguage).]  could be blocked because of your parental controls or security settings.