Definition of "Terrestrial"

It will be manifest that natural scenery must present many beautiful varieties of effect altogether unfamiliar to us terrestrials, who know of no colours in scenery except those inherent in the objects themselves which form the landscape.

1873, Richard Anthony Proctor, The Expanse of Heaven‎, page 235

The other was not a Terrestrial, but a visiting Martian.

1925, Hugo Gernsback, Ralph 124C 41+, page 41

There'd been Earthling girls; and not a few Khazaki women had been intrigued by the big Terrestrial.

1950 Fall, Poul Anderson, “Star Ship”, in Planet Stories, volume 4, number 8, page 74