Definition of "fadeless"

Stranger! new flowers in our vales are seen,With a dazzling eye, and a fadeless green,—

1827, Lydia Sigourney, Poems, The Stranger's Flower, page 197

Palms of vict'ry thou shall bear, / And a crown of fadeless light / Will be given thee to wear, / And a robe of spotless white.

1887, Various, The Poets and Poetry of Cecil County, Maryland‎

That look is the fadeless, ever infantile immortality within.

1892, Herman Melville, White Jacket‎

[…] And beyond the radiant walls of living stones / They dreamed vast meadows and hills of fadeless green.

1910, Helen Keller, The Song of the Stone Wall‎