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Published: 1st September 2021

Citation: Astronist Institution. (2021). Dilatism. Available: Last accessed [enter date e.g. 1st Sept 2021].


noun  Astroeschatology

the belief that extraterrestrial life has not yet been found by humanity because all other forms of either sentient or sapient life in The Cosmos have become extinct. Contrasted with preliminism.


Dilatist | dʌɪˈ latɪst | adjective & noun
Dilatistic | dʌɪˈ latɪstɪk | adjective
Dilatistically | dʌɪˈ latɪstɪk(ə)li | adverb


Astro-English: from Astronese, the word dilate is used here to denote that which “is larger or wider” and along with the suffix -ism to denote “a belief” of some sort comes to form the notion that “extraterrestrial life has not been found by humanity because humanity exists long after all or most other sapient civilisations have died out”, hence to represent the opposite of the position held in preliminism.

Encyclopaedic entry for “Dilatism” on

© 2021 by the Astronist Institution.

Notice: Each definition, extended description and etymological description found on is under copyright protection of the Astronist Institution and therefore should not be used elsewhere except in direct quotation along with a reference to its respective definition page on Exempt from this copyright protection are the words being defined themselves, unless otherwise stipulated with the tag trademark in which the use of such a word for your own commercial purposes is likely a breach of copyright.

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