Definition of "glimmering"

The pale, chill glimmering of earliest morning was faint in the east, from which the clouds were slowly breaking; there was just light enough to enable her to find her way.

1834, L[etitia] E[lizabeth] L[andon], chapter XLIV, in Francesca Carrara. […], volume III, London: Richard Bentley, […], (successor to Henry Colburn), page 366

When she sang in the kirk, folk have told me that they had a foretaste of the musick of the New Jerusalem, and when she came in by the village of Caulds old men stottered to their doors to look at her. Moreover, from her earliest days the bairn had some glimmerings of grace.

1902, John Buchan, The Outgoing of the Tide