Definition of "untraversed"

I was therefore compelled to relinquish, with great reluctance, the favorite project of further examining the coast of this unknown though interesting country; and, directing our route over an hitherto untraversed part of these seas, we proceeded without further delay towards the pacific ocean.

1798, George Vancouver, A Voyage of Discovery to the North Pacific Ocean, London: G.G. and J. Robinson, Volume I, Chapter II, p. 44, entry for 21 October, 1791

In front of us the untraversed plain shone white as a new-laid tablecloth and dazzling even through a pair of smelter’s glasses.

1933, Robert Byron, First Russia, Then Tibet‎, Part II, Chapter 8