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Published: 1st September 2021

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


noun  Astroeschatology

a general belief in the existence of extraterrestrial life in The Cosmos without specification as to what type of life this may be or the abundance of such life.


Extraterrestrialist | ˌ ɛkstrətəˈ rɛstrɪəlɪst | adjective & noun
Extraterrestrialistic | ˌ ɛkstrətəˈ rɛstrɪəlɪstɪk | adjective


Astro-English: from Astronese, the word extraterrestrial is used in this context for its primary sense as a noun to denote “a hypothetical being from outer space” which, when conjoined to the suffix -ism which denotes “a formalised belief”, comes to establish the general affirmation “that life beyond Earth exists” without making a specification as to the sentience or sapience of such life.

Encyclopaedic entry for “Extraterrestrialism” on

© 2021 by the Astronist Institution.

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