Definition of "moveless"

Not a single cloud mars the flawless azure; / Not a shadow moves o'er the moveless crops; […]

1889, Mathilde Blind, “[Poems of the Open Air.] Reapers.”, in The Ascent of Man, London: Chatto & Windus, […], page 140

The trooper had dipped into the scrub and now came out of it, pushing his horse along at a smart walk, and sitting as moveless in the saddle as destiny in person.

1938, Norman Lindsay, Age of Consent, 1st Australian edition, Sydney, N.S.W.: Ure Smith, published 1962, page 215