extraterrestrial has definitions from the field of folklore
1
[ adjective ] originating or located or occurring outside Earth or its atmosphere

Examples

"is there extraterrestrial life?"

Used in print

(1961 Research Highlights of the National Bureau of...)

Besides the well-known hydrogen line at 21 cm wavelength , the spectra of extraterrestrial radio_sources may contain sharp lines characteristic of other atoms , ions , and small molecules .

Success in observing these spectral lines has so_far , apparently , been confined to the laboratory ; extraterrestrial observations have yet to be reported .

Related terms

Earth

2
[ noun ] (folklore) a form of life assumed to exist outside the Earth or its atmosphere

Related terms

hypothetical_creature

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