"A challenge is an attempt to remove or restrict materials, based upon the objections of a person or group. A banning is the removal of those materials. Challenges do not simply involve a person expressing a point of view; rather, they are an attempt to remove material from the curriculum or library, thereby restricting the access of others. Due to the commitment of librarians, teachers, parents, students and other concerned citizens, most challenges are unsuccessful and most materials are retained in the school curriculum or library collection."
This definition was retrieved from the American Library Association’s website.
In 1986, in response to inquiries from librarians facing book or material challenges for the first time, the Intellectual Freedom Committee of the American Library Association developed the following list of definitions to clarify terminology associated with challenges:
Expression of Concern. An inquiry that has judgmental overtones.
Oral Complaint. An oral challenge to the presence and/or appropriateness of the material in question.
Written Complaint. A formal, written complaint filed with the institution (library, school, etc.), challenging the presence and/or appropriateness of specific material.
Public Attack. A publicly disseminated statement challenging the value of the material, presented to the media and/or others outside the institutional organization in order to gain public support for further action.
Censorship. A change in the access status of material, based on the content of the work and made by a governing authority or its representatives. Such changes include exclusion, restriction, removal, or age/grade level changes.