adjective.
Originating, located, or occurring outside Earth or its atmosphere.
noun.
An extraterrestrial being or life form.
The Century Dictionary and Cyclopedia
Occurring outside of the earth; extramundane.
the GNU version of the Collaborative International Dictionary of English
adjective.
originating or located or occurring outside Earth or its atmosphere.
noun.
a hypothetical form of life existing outside the Earth or its atmosphere, especially intelligent life on other planets or in other solar systems.