Definition of "thunderstruck"

The overthrown he rais’d, and as a HeardOf Goats or timerous flock together throngdDrove them before him Thunder-struck,

1667, John Milton, “Book VI”, in Paradise Lost. […], London: […] [Samuel Simmons], […]; republished as Paradise Lost in Ten Books: […], London: Basil Montagu Pickering […], 1873, lines 856-858

Therefore he whacked the old nigger mercilessly, while a big crowd of his people watched him, thunderstruck, till some man, - I was told the chief's son, - in desperation at hearing the old chap yell, made a tentative jab with a spear at the white man - and of course it went quite easy between the shoulder-blades.

1899 February, Joseph Conrad, “The Heart of Darkness”, in Blackwood’s Edinburgh Magazine, volume CLXV, number M, New York, N.Y.: The Leonard Scott Publishing Company, […], part I, page 198

And for days Europe and the great powers were thunderstruck, again and yet again, by the news of Turkish forts falling, Turkish cohorts collapsing, the unconquerable Crescent going down in blood.

1916, G. K. Chesterton, chapter IX, in The Crimes of England

'Unless the strikers rally,' I declared to the meeting, 'and continue the strike till a settlement is reached, or till they leave the mills altogether, I will not touch any food.' The labourers were thunderstruck.

1927-29 — Mohandas Gandhi, An Autobiography or The Story of my Experiments with Truth, Part V, The Fast, translated 1940 by Mahadev Desai