Definition of "filmy"

The eyes were small, and of a dead filmy black; they said nothing, even when fixed upon you.

1837, L[etitia] E[lizabeth] L[andon], “Poverty”, in Ethel Churchill: Or, The Two Brides. […], volume III, London: Henry Colburn, […], page 279

On the following morning the head of Strezlecki Creek was passed and in the dim distance could be seen the filmy blue outlines of Mount Arrowsmith, behind which lay the magnificent Nardoo station.

1894, Ivan Dexter, Talmud: A Strange Narrative of Central Australia, published in serial form in Port Adelaide News and Lefevre's Peninsula Advertiser (SA), Chapter XVI