Definition of "silvery"

OF all th' enamell'd race, whose silvery wing / Waves to the tepid zephyrs of the spring.

1728, [Alexander Pope], “(please specify the page)”, in The Dunciad. An Heroic Poem. […], Dublin, London: […] A. Dodd

Nothing was to be seen save flat meadows, cows feeding unconcernedly for the most part, and silvery pollard willows motionless in the warm sunlight.

1898, H.G. Wells, The War of the Worlds, London: William Heinemann, page 98

Manganism has been known about since the 19th century, when miners exposed to ores containing manganese, a silvery metal, began to totter, slur their speech and behave like someone inebriated.

2014 April 21, “Subtle effects”, in The Economist, volume 411, number 8884

The hand grasped the curtain, and drew it aside, and as it did so I heard a voice, I think the softest and yet most silvery voice I ever heard.

1886 October – 1887 January, H[enry] Rider Haggard, She: A History of Adventure, London: Longmans, Green, and Co., published 1887