Of or from outside the earth or its atmosphere: searches for extraterrestrial intelligence
More example sentences
- I suggest that green fireballs may be extraterrestrial probes entering our atmosphere.
- A former teacher founded the cult in 1969 and claimed to have shielded earth from extraterrestrial invasion on numerous occasions.
- The researchers still didn't detect extraterrestrial microorganisms on Earth.
A hypothetical or fictional being from outer space.
- Mars has long been considered not only difficult to explore but alluring, given its reputation as the most likely spot in the solar system to harbor extraterrestrials.
- While science fiction routinely describes face-to-face encounters with intelligent aliens, it may be that we will never actually meet extraterrestrials.
- The two principal alternatives to the explanation that crop circles are made by humans are that they are made by extraterrestrials, or that they are made naturally by wind vortices.
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