The Critical Dictionary of Apocalyptic and Millenarian Movements (CDAMM) is an online encyclopedia covering secular and religious expressions of apocalyptic and millenarian thinking throughout history and across cultures.

CDAMM provides online, open-access articles written by academic authorities for fellow scholars, teachers, students, journalists, and anyone else interested in information about the history of apocalypticism and millenarianism. The Dictionary is intended to provide an authoritative and balanced information resource written in an accessible scholarly style. Articles are commissioned by the Centre for the Critical Study of Apocalyptic and Millenarian Movements (CenSAMM). Following its launch in January 2021, articles continue to be commissioned and added to the Dictionary - so coverage will continue to grow and develop over time.

Please see our short articles on key CDAMM definitions:

The Dictionary is edited by the Academic Directors of CenSAMM, Prof. James Crossley and Dr. Alastair Lockhart. Each article is intended to be thorough and informative while preserving the distinctive style and voice of its author. Article texts are made available on an "open access" basis under a Creative Commons licence that allows readers to share the text for non-commercial purposes with appropriate credit and without making changes. See the Creative Commons BY-NC-ND 4.0 for full details about this.

Images used on CDAMM are used under an appropriate licence, including public domain and out of copyright, or on a fair dealing basis. We have made every effort to ensure images are used in an appropriate way and correctly credited - please contact the editors if you believe an image on the site has been incorrectly used or credited.

We welcome comments and observations from CDAMM readers about any aspect of the Dictionary. Please email the editors on dictionary@censamm.org.