I'm not sure I've remembered the word right as I've only ever heard it spoken. My History professor would say something like "The Emperor used the tax money extensibly to defend the people". What he meant was that the Emperor was supposed to use the money for the defense of the people, and he did, but a lot of the money also went to his personal luxury. I've searched the web for the word, but I always get "extensively" and the definition doesn't make sense with the context I've heard it in. Does anyone know the word or the definition which he was using?