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extraterrestrial

[ek-struh-tuh-res-tree-uh l] /ˌɛk strə təˈrɛs tri əl/
adjective
1.
outside, or originating outside, the limits of the earth.
noun
2.
an extraterrestrial being:
a science fiction novel about extraterrestrials conquering the earth.
Origin
1865-1870
1865-70; extra- + terrestrial
Related forms
extraterrestrially, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for extra terrestrial

extraterrestrial

/ˌɛkstrətɪˈrɛstrɪəl/
adjective
1.
occurring or existing beyond the earth's atmosphere
noun
2.
(in science fiction) a being from beyond the earth's atmosphere
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for extra terrestrial

extraterrestrial

adj.

also extra-terrestrial, 1812, from extra- + terrestrial. As a noun from 1956.

Online Etymology Dictionary, © 2010 Douglas Harper
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extra terrestrial in Science
extraterrestrial
  (ěk'strə-tə-rěs'trē-əl)   
Originating, located, or occurring outside the Earth or its atmosphere.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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extra terrestrial in Culture
extraterrestrial [(ek-struh-tuh-res-tree-uhl)]

A descriptive term for things outside the Earth, such as possible civilizations outside the solar system, or objects, such as meteorites, that actually reach the Earth.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Difficulty index for extraterrestrial

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Word Value for extra

12
12
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